After the death of her husband, Chu Pik Ha returns to her maiden home with her son, in a deliberate attempt to take over the family jewelry business from her elder sister Chu Pik Wan. To prevent Ha from getting too out of hand, Wan needs her husband Ho Cheung Hing to create trouble for her sibling. Hing does not follow her instructions, but instead secretly helps Ha tackle her problems one by one. Wan soon comes to realize that Hing has never really got over Ha. Wan's younger sister Chu Pik Lam is still attending school and is too young to deal with such family issues. Wan feels a profound sense of helplessness and becomes even more frustrated when So Lai Sheung turns up suddenly claiming to be a mistress of her late father and pregnant with his baby. Out of respect for their father, the sisters agree to put Sheung up for the time being until the situation becomes clearer. Shortly thereafter, Ha discovers that Sheung is just a tool of Sang guy who has been plotting to wage a battle of will against the Chu's.

Anri Akama (Marie Iitoyo) is an ordinary 20-year-old university student. She is kicked out of her home, because her mother has a boyfriend and Anri Akama's boyfriend leaves her. She doesn't have a place to stay and spends time at an internet cafe. At that time, Anri Akama hears from a friend about "Papa Katsu." She signs up on the "Papa Katsu" website to meet men through the site. The men offer money for platonic companionship, including going on dates or having meals together. One day, she waits for a man at a hotel lobby. The man is 45-year-old Wataru Kuriyama (Atsuro Watabe).

~~ Adapted from book 3 of the web novel series "Love Syndrome"

The novelist Shiraishi Kiyoshi (Yasuda Ken) receives a letter from a mother who has a son with a stuttering problem. She asks Shiraishi in the letter if he would encourage her son to not be daunted by his stuttering. Shiraishi thinks about his own childhood and decides to talk to his editor Nomura (Fuma Kikuchi) about writing his personal story. Muroi (Fukikoshi Mitsuru), an editor who is Shiraishi’s senior, picks up on his intentions. Shiraishi has had a stuttering problem since his youth, particularly the “ka” and “ta” columns of syllables and even stumbled over his own name. He transferred schools a number of times due to his father Kenichi’s (Mashima Hidekazu) work and was laughed at by classmates each time he introduced himself. The strain of transferring schools got to him in the first grade of elementary school. Even when Shiraishi was asked by his mother Yoko (Kanjiya Shihori) what present he would like for Christmas, he could not pronounce the name of the game he wanted because it started with the letter “gi”. Unable to convey his feelings to friends and family in words, Shiraishi wished for friends who could talk about anything. He mistook the hymn Kiyoshi Kono Yoru, better known as Silent Night in English, as Kiyoshiko no Yoru and the imaginary Kiyoshiko was his ideal friend. However, in reality, his Christmas became a day of miserable memories. He eventually wrote about the frustrations that he suffered in Kiyoshiko. Besides the title Kiyoshiko, Shiraishi also wrote about his exchanges with the lonely Occhan (Chihara Seiji) in Donguri no Kokoro, and about his decision to leave both his family and the university student (Fukuchi Momoko) who liked him, for further studies in Tokyo and his departure for the metropolis in Tokyo. Even though he still stutters as an adult, he has a pleasant life with his wife Saori (Nishida Naomi).

Campus life at Seoyeon University has always been relatively peaceful, but when an anonymous post pops up on the school’s online community, the entire campus is flipped upside down. Posted by a mysterious individual, known only as “M”, the entire school is abuzz with curiosity and excitement. Determined to uncover the identity of the mysterious “M”, students all across the campus set out to uncover the truth. But the task will prove to be anything but easy.

Second year student in the Business Administration Department, Ma Joo Ah has taken a keen interest in uncovering the identity of “M”. While she has no interest in pursuing either her own dreams, nor any sort of romantic relationship, she does have a strong desire to solve the school’s current mystery. Alongside her is Cha Min Ho, a second year student in the Computer Science Department, and Joo A’s oldest friend. Together with Economics major Seo Ji Min and Business Administration major Park Ha Neul, the four are determined to discover “M”’s true identity and bring an end to this mystery, once and for all.

As their journey towards the truth progresses, the four friends find themselves in an ever-changing tangle of morphing relationships and budding romances. With emotions high and hearts aflutter, uncovering the identity of “M” has never been more complicated. Will the friends be able to solve this mystery or will “M”’s true identity remain hidden forever?

Adapted from the web series “Love Playlist”.

Three high school girls are chosen among 700,000 applicants to be on the reality show “Marry the Prince”. They must find their true love in the four princes they encounter.

This series was adapted from a novel of the same title, written by the renowned wuxia novelist Wen Rui-An. "Strike at Heart" tells the tale of friendship, loyalty, love and revenge about Marquis Chu Kot and his friends in their younger days. Marquis Chu Kot was the master of The Four Constables - there were plenty of series adaptations on the four constables by ATV, Taiwan and Mainland China. Therefore, "Strike At Heart" can be considered a prequel.

TYGS (Sunny Chan), Chu Kot (Joe Ma) and Thirteen (Stephen Au) studied under the same martial arts clique Zhi Joi Mun since childhood. Tje three of them forged a strong bond and each had a special skill of their own.

TYGS was intelligent but physically weak, therefore he turned to studying yin yang and the five material agents. Chu Kot and Thirteen were talented in martial arts and learnt "Amazing Spear" and "Heartbroken Arrow" respectively from their master. After being separated for more than 10 years, the brothers finally reunited but ended up at daggers drawn.

After leaving the clique Chu Kot served the imperial government and was one of the emperor's favorite officials. His mission was to protect the country from the Gum invasion and corrupt minister Choi Ging (Shek Sau) and his assistant Zhong Shu (Derek Kwok). Thirteen resented the fact that he was unable to beat Chu Kot before leaving the clique and spent 10 years practicing martial arts in the hope of defeating him one day. TYGS enjoyed a carefree life at Bak Soh Yuen, immersing himself in chess, qin, and his pet tortoise Gum Chai.

Thirteen returned and demanded a duel with Chu Kot. Chu Kot was unwilling to fight him, but had no choice due to Choi Ging's constant meddling and manipulating the na? Thirteen. Their conflicts were aggravated when both of them fell in love with the gentle and cheerful Siu Keng (Charmaine Sheh). Meanwhile, the impulsive Jik Nui (Annie Man) from Divine Needle Sect met TYGS after a misunderstanding. She fell for his gentlemanly ways and forced TYGS to marry her.

To salvage their friendship, Chu Kot decided to back away from the love triangle and pushed Siu Keng away with the help of Mong Dip (Nnadia Chan), a famous singer-prostitute. On the night of her wedding to Thirteen, Siu Keng found out the truth and hated Chu Kot for giving her away like a toy. She vowed revenge and wanted to destroy everything he stood for ? his friendship, loyalty and honor.

TYGS was accustomed to living alone and constantly neglected Jik Nui because he regarded her as a nuisance. Jik Nui tried to change her behavior to please TYGS, but he preferred to pay attention to his pet tortoise Gum Chai.

Under Siu Keng's manipulation, Thirteen began to go against Chu Kot and went berserk after attempting to master an internal martial arts manual "San Tze Ging". Chu Kot was also learning the same manual as he wanted to cure Mong Dip of poison. Mong Dip was actually sent to spy on Chu Kot by her lover and master Choi Ging. Mong Dip was saddened and disappointed when she realized Choi Ging killed her baby and tried to commit suicide with him. She failed and died in Chu Kot's arms.

Siu Keng was saddened to hear of Chu Kot's death and regretted her actions. She went to his grave to confess that she still loved him. Thirteen overheard this and was hurt that Siu Keng married him for revenge. He went berserk again and injured himself. Feeling guilty, Siu Keng went to look for a cure from the Taoist priest Sam Bin and was saved by Chu Kot from his lecherous hands. Siu Keng begged Chu Kot to elope with her but he refused because he had too many responsibilities.

Knowing that Chu Kot faked death, Choi Ging set up a trap and accused him of betraying the country with the Gum people. TYGS and Jik Nui became fugitives trying to help Chu Kot. On the other hand, Siu Keng decided to stick with Thirteen but he was narrow-minded and constantly accused her of having affair with Chu Kot. Desperate to please Thirteen, Siu Keng agreed to retrieve the full copy of San Tze Ging from Sam Bin ? only to be raped in exchange for the top half of the manual. Chu Kot found out about this and killed the Taoist priest when Siu Keng returned to get the remaining manual. Ashamed, she tried to commit suicide.

Thirteen flew into a rage thinking Chu Kot was after his wife and tried to kill him. Siu Keng ran out and broke his arrow to save Chu Kot. Embittered, Thirteen finally understood the true meaning of "Heartbroken Arrow". Chu Kot narrowly escaped with the wounded Siu Keng. Jik Nui went through thick and thin with TYGS and he realized he had fallen for her. However, TYGS had to divorce her because he didn?t want her to get involved with Chu Kot's problem.

Humiliated and filled with hatred, Thirteen vowed to kill Chu Kot and anyone who dared to stand in his way. Choi Ging seized this opportunity to manipulate Thirteen to assist him in abducting the emperor. Jik Nui attempted to lure Thirteen and assassinate him with the help of Divine Needle Sect but she was defeated and thrown down the cliff. TYGS arrived too late and regretted not appreciating Jik Nui when he had the chance.

After he fully mastered the San Tze Ging, Thirteen was invincible. Chu Kot studied the secret of "Amazing Spear" in order to defeat Thirteen's "Heartbroken Arrow". Touched by Siu Keng's undying devotion, Chu Kot promised to live in seclusion with her after he settled his problems with Choi Ging and Thirteen. Siu Keng was overjoyed that they could finally be together?

Even though he knew he couldn't defeat Thirteen, Chu Kot had no choice but to walk into Choi Ging's trap as he wanted to save the emperor. Thirteen couldn't bring himself to kill Siu Keng when she begged him not to hurt Chu Kot as he still loved her. Siu Keng killed herself with the arrow after telling Thirteen she was raped in order to get him the manual - Thirteen was remorseful but it was already too late. Siu Keng died peacefully in Chu Kot's arms knowing that Thirteen had forgiven them. Chu Kot and Thirteen were extremely grieved.

Choi Ging's martial arts were destroyed because he was injured by Thirteen arrow, rendering him useless. The emperor exiled him to foreign lands to make him suffer for his past wrongdoings. Since they both had no more burdens, Thirteen and Chu Kot had their final duel in front of Siu Keng's altar (how ironic - she died to stop them from fighting, and what are they doing now?). Chu Kot achieved a breakthrough with his "Amazing Spear" final skill and beat Thirteen. Unable to live with defeat, Thirteen committed suicide.

Jik Nui survived her fall and was reunited with TYGS. They became a loving couple and soon Jik Nui was pregnant. Chu Kot continued to serve the emperor, but felt empty without Siu Keng.