Park Si Hoo

Baek Shi-Yoon is an ex-secret agent and 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. Shi-Yoon then meets a young man who works as a temporary employee, but who wants to become a police officer. Shi-Yoon trains him as a secret agent and they fight together against evil.

Hwang Tae Hee is the daughter of a chaebol and a team leader at her workplace. She is married to Bong Joon Soo, who works at the same company. When Bong Joon Soo's ex-girlfriend, Baek Yeo Jin, who happens to be Hwang Tae Hee's rival as well, begins to work in her team, troubles start to surface. Tae Hee has to juggle her challenges in love with those at work, helping shape her boss and department director, Goo Yong Shik, from an insensitive and uninterested second-generation chaebol to a true leader. Tae Hee's seeming success in love, however, presents her with another problem as she begins to realize that marriage involves just as many obstacles to overcome.