Yoon-Jung accidentally calls a stranger, instead of her boyfriend, and has phone sex with the unknown man. When Yoon-Jung’s relationship with her boyfriend turns sour, Yoon-Jung meets Hyun-Seung, the stranger she had phone sex with.

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

Na-mi, a transfer student, becomes a laughingstock on her first day of school because of her strong southern dialect. Six girls jump in to help the new kid adapt to the new environment, and the girls come to call their circle of friends “Sunny.”