Former secret agent Baek Shi Yoon (Park Shi Hoo) is a well-trained human weapon. Hiding his past, he buys the bar “Neighborhood” and runs it is as the owner. He gets close to the neighborhood regulars at his bar and sympathizes with their pain. He then meets a young man, Choi Chan Kyoo (Lee Soo Hyuk) who works as a temporary employee. Choi Chan Kyoo wants to become a police officer. Baek Shi Yoon trains him as a secret agent and they fight together against evil.