Tae-sik gets out of a prison after spending 10 years for killing a man and wishes nothing but an ordinary life. A local lady welcomes him into her household like a son and he gets a second chance in life. His former gang tries to destroy his new home in order to build a night club but he won’t let them destroy his new family.

Ahn Soo-ji and Lee Jae-joon, who are oblivious to each other's real profession as secret agents, are in an ill-fated relationship. Three years later, they accidentally meet targeting the same enemy.

Jun Oh, a man suffering from severe headaches. With his headaches come some unexpected special powers. Meanwhile, two narcotics detectives stumble upon a corpse under a bridge. And that's when things start to get strange...