Chinese secret agent Da-hee receives intel that a large number of illegal firearms are being smuggled into Korea and is sent to investigate the case. She meets Su-han, who is supposed to help her with the case, but due to his lackluster skills they fight over trivial things. But as their witnesses are suddenly murdered, the two of them quickly become the prime suspects.
With high competitive spirit, a high school gangster Seung-in lets nobody to win over him. Hyun-tae is his best friend but wants to fight with nobody. One day, two boys get caught into a big fight that the local mobster is involved in, and they realize what true friends are.
During the Joseon Dynasty, lowborn Chae-sun challenges the rule that states only men allowed to sing while navigating devotion to her teacher and the demands of the king's father.
Nam-bok, a middle-aged South Korean farmer is conscripted and assigned a mission to deliver a classified military document that may decide the fate of the war. After losing it while under attack from the enemy, he then faces a teenage North Korean soldier named Yeong-gwang who happens to acquire the secret document on his way to the North.
Residents, who are evicted from their homes in a designated urban renewal, demonstrate against their removal. The police arrive and attempt to end the demonstration. Death happen that lead to the bigger problem.
Detective Cho is incompetent and always fails to be promoted. His only pleasures in life are spying on neighbors who are having affairs or binge drinking. One day, Cho comes across the corpse of what seems to be a child on a nearby mountain and he decides to investigate the case, thinking that this is his last chance to impress his boss. Cho enlists the help of his partner, Detective Lee, and together the two embark upon an investigation that will test their professional judgement. The more they learn about the case, the more they come to suspect that the poverty-stricken father of the dead child is their killer. But the case goes off course when the two begin to sympathize with him.
