In this anthology film centered around the theme of "Eros," five separate stories are presented. The main characters from each segment are connected with each other in one way or another.
"His Concern"
A man is attracted to the woman sitting across from him on a train ride to Busan. He then gets off the train after her, even though it's not his stop. He is then able to get her phone number. A few days later the man plans to meet the woman for the second time.
"I'm Here"
Ahn Hye Rim awaits her husband, while hiding, to give him a surprise. Kang Hyeon Woo always worries about his wife being left alone. Hye Rim worries about Hyeon Woo because he will be left alone soon.
"33rd Man"
On the set of a movie, fresh new actress, Kim Mi Jin, and her charismatic senior actress, Park Hwa Ran, are having difficulties because of their stubborn and demanding director Bong Jan Woon. In the end, the senior actress Hwa Ran transforms Mi Jin into a sexy vixen to seduce the director.
"In My End is My Beginning"
Lee Jeong Ha learns that her husband Min Jae In has just died in a car accident while on a road trip. She then discovers that her husband was having an affair with her old high school friend Kang Na Ru. After the car accident, Na Ru comes to Jeong Ha and asks to live with her under the promise of her unconditional devotion.
"Believe in the Moment"
Three couples are all high school students and close friends. None of the couples have strong convictions about their relationship. They then decide to exchange partners for 24 hours.
Geum Jan Di comes from a poor family who owns a dry-cleaning shop. One day, she visits Shinhwa High School, a prestigious school for the wealthy, and saves a student trying to commit suicide because of bullying. For her heroic act, Jan Di receives a swimming scholarship and starts attending the school.
In school, she meets the notorious F4, the most popular and powerful group of boys at the school, consisting of Gu Jun Pyo; the leader of F4 and heir to the Shinhwa Group, Yoon Ji Hu; the grandson of a former president of Korea, So Yi Jung; a skilled potter who comes from a family that owns the country's biggest art museum, and Song Woo Bin; whose family runs the country's largest construction company.
Her life at school starts out miserable, as she doesn't fit in with other students because of her status, and later becomes worse when she is labeled as the new bullying target of the F4.
Adapted from the manga series "Boys Over Flowers" (花より男子) written by Kamio Yoko (神尾葉子).