Sammi Shum quits her studies and marries a tycoon's son, Raymond Lam, despite her father's objection. At first, she feels like a princess living in a fairy tale, until she discovers her husband is having an affair. She wakes up from her dream and finds that the reality is that she is suffering from post-natal depression She loses the custody of her son, QQ, after divorcing her husband. Luckily, her friend Yip Heung Faifinds her an assistant job in a law firm. She works hard and resumes her unfinished law degree hoping that she will get her son back. When everything settles down, she meets Mark Ko who represented her husband for her son's case and is now her boss. He does not remember her. She is aggressive towards him and that confuses him. Eventually, they understand each other more and love sparks between them. Meanwhile, her son reappears.

This drama is about the life of the fourth king of the Joseon Dynasty of Korea, King Sejong who is considered the greatest king in Korean history for creating Hangul, the Korean alphabet and having many skilled followers such as Jang Yeong-sil. The Great King Sejong is a full scale politic drama describing how King Sejong and his loyal retainers cooperate and contrive to make his dynasty a better place. While King Sejong was in throne, the Chosun Dynasty enjoyed the most fortunate and happy age ever.

A Communist spy serving as an officer of the Japanese puppet regime joins hands with Russian and Korean spies to execute an assassination plot.

In the year 1941, Nazi Germany declares war against the Soviet Union. Given that Manchukuo's loyalties lie with Cheng Tian, the Russians are caught in a situation where they face threats on all sides. Their intelligence agency devises a long-term plan in secret. Communist spy Tang Fei (Liu Yunlong) receives a mission to infiltrate the enemy by pretending to be one of their own. At the Security Bureau, he crosses paths with Cai Meng (Han Chae Young), a woman determined to fight against the Japanese regime. They gain each other's trust as they try to outsmart the enemy within their own territory.

Jin Da Rae is the daughter of a female diver in Jeju Island. After her father mysteriously passes away, she tries to uncover the truth about his death.

One day, she coincidentally saves Hyuk from torrent waters. Hyuk works for an orange farm opposed to his father's wish that Hyuk should take over his resort development business. Da Rae and Hyuk gradually fall in love.

However, their love is put to a risky test after Hyuk's half-brother also discovers his love for Da Rae. While all 3 of them get entangled in a complicated love triangle, Da Rae finds out that Hyuk is connected to her father's death.

Episodes: 12