Min-jun (Song Il-gook) and Ji-won (Son Ye-jin) are so-called the first-rate "players" who are dating gurus with 100% success rates in any dating pursuits. Following her usual systematic dating rules, Ji-won fakes a schematic car accident to capture Min-jun's attention and successfully approaches him.
In a remote village called Seokjeongni, the residents manage to learn that North Korean troops have invaded the South via the chief’s radio. Normalcy nevertheless continues for the villagers, who are all preoccupied with more pressing matters: an arranged wedding. Just a few days before the ceremony the groom is forced to flee when news breaks that Northern troops are fast capturing cities and annihilating anticommunist activists. But Seol-hee (Jung Ryeo-won) has no time to brood over her missing, beloved husband-to-be. North Korean troops arrive in town and announce their holy mission to "liberate" the Southerners.
Jong-hwan and Su-kyung meet in a cafe. Jong-hwan is a high-school teacher and Su-kyung is a cafe maid. They fall in love and marry; however, when Jong-hwan goes to take care of his family, Su-kyung gets ill, forcing him to care for her.
Seo-hyun is an ordinary housewife in her late thirties with a ten-year-old son and a successful architect husband. For Seo-hyun, life is a series of banal routines, but she is well provided with upper class comforts. Her sheltered life is suddenly threatened with the appearance of U-in, her much younger sister's attractive new fiance. U-in approaches Seo-hyun and attraction evolves into a passionate affair. Seo-hyun is aware that falling for the younger man will destroy her and her family, but she cannot help herself and the new feelings that are stirring within...
The film follows three people who live in the same shelter. Gwang-su tried to escape his family's past after his older brother killed himself. Jong-min dreams of going to Hollywood by writing screenplays. Se-jin works in a musical instrument shop and falls in love with Gwang-su.
After discovering that his highschool sweetheart, whom he thought dead, is in fact alive and engaged to another man, the protagonist attempts to meet her. The girl's family reject him and the girl treats him coldly, causing the boy to leave. He later discovers her true feelings through a letter.
Ji-young is a beautiful widow of an extremely wealthy family who finds herself attracted to Sang-woo, whom she meets at a ski resort. Sang-woo is the CEO of a company that arranges art exhibitions, and Ji-young finds him different from the gold diggers who usually come on to her. She starts opening up to him, because he is gentle-natured and seems to be rich enough not to want her for her money. But actually, Sang-woo is a con artist who only has ₩4,000 left to his name. He approached her because he has his eye on an art piece called "Galatea's Tears" which is priced at over ₩2 billion. His attempts are thwarted each time by a woman named Sung-hye who always appears right before he is about to make a crucial move. She claims to be Ji-young's batchmate from high school, but Ji-young doesn't remember her at all. Sang-woo is suspicious of Sung-hye and follows her, only to have his cover blown. Sung-hye had, in fact, been targeting Sang-woo. He panics but is surprised when she proposes that he let her in on his scam to steal "Galatea's Tears.
Chun Ji-woong is an unemployed college graduate who continually fails job interviews and lives off an allowance from his mother, who runs a small restaurant in the countryside. Ji-woong is an eternal optimist, but having no money is cramping his dating life when he can't even afford to buy a pack of condoms. Yet despite living in a tiny, dingy apartment in a low-income neighborhood, he's about to get evicted when his mother abruptly cuts him off and he can't pay the rent.
Loose cannon Kwak Jang-bae (Shin Ha-kyun), a neighborhood policeman, is obsessed with his sexual prowess and continually wants to have sex with his live-in girlfriend, Ji-su (Uhm Ji-won), an English teacher at a private school who is bored with his macho behavior. Forthright high-school student Ju Ja-hye (Baek Jin-hee) sells her sweat-stained panties on the internet and wants to lose her virginity to scruffy fish-sausage seller Choi-kang Sang-du (Ryoo Seung-bum); the older man is uninterested in her advances but Ja-hye cannot work out why. Ja-hye's mother (Shim Hye-jin), who sells hanbok (traditional Korean female dress), discovers the owner of a hardware shop opposite, Gi-bong (Sung Dong-il), is into S&M and starts having sessions with him in the back of his shop, assuming a dominatrix role. Kim Gwang-rok (Oh Dal-su), Ja-hye's teacher, is a married man who is secretly into wearing women's clothes when his wife is not around. When Jang-bae discovers Ji-su has ordered a vibrator, he has a major crisis over his manhood and stops sleeping with her. Meanwhile, as his neighborhood has been marked for a moral clean-up campaign by the police, it's only time before Jang-bae also bumps heads with its denizens' licentious goings-on.