Yoon Ji-woo's father dies suddenly. She wants to desperately take revenge on whoever is responsible for her father's death. Yoon Ji-woo works for drug crime group Dongcheonpa. Choi Moo-jin is the boss of the drug gang. With the help of Choi Moo-jin and to uncover the reason for her father's death, Yoon Ji-woo joins the police department and becomes a mole for the drug group. Yoon Ji-woo is assigned to work in the drug investigation unit in the police department. Her partner there is Detective Jeon Pil-do.

A young American woman from the Midwest is hired by a marketing firm in Paris to provide them with an American perspective on things.

When a junior woos Vee's friend, Bar, swearing to love only one in life, Bar has to cut ties with Mark. But God plays a joke on them and something happened between Vee and Mark. Mark chooses to tuck away and draws an end to it. However, Vee doesn't want an end with Mark. Mark himself loves Vee although he knows Vee has a beloved girlfriend. Will the love between them make it? When will the awkwardness break out? What will Vee do?