Storyline:

Kang-Mu (Hwang Jung-Min) was once an excellent agent, but he is now married to Mi-Seon (Yum Jung-Ah) and hides his past as an agent. He is now a house husband, who is good at taking care of chores. His wife Mi-Seon works as an ace detective in the violent crimes division at a police station. One day, Agent Jang Hee-Ju (Jeon Hye-Jin), who is an ex-colleague of Kang-Mu and now in trouble, appears in front of Kang-Mu. His peaceful days are shaken. Kang-Mu helps Hee-Joo without Mi-Sun knowing. Mi-Seon happens to witness a suspicious side of Kang-Mu and she silently follows him. Kang-Mu and Mi-Seon get involved in a huge incident.