Kong Ji Hyuk works as the leader of the Mother TF team at a baby products company. He is sharp, calm, and executes passionately. One day, a team member, Ko Da Rim, suddenly kisses him. This places him in a difficult position, because she is a married woman. Meanwhile, Ko Da Rim is a single woman who needed a job to support herself. She got a job as a temporary employee at the baby products company where Kong Ji Hyuk works. She lied about her background and stated she was married with a child to get hired there. She now works under Kong Ji Hyuk on the Mother TF team. Her only interest is to become a permanent employee there, but she begins to have feelings for Kong Ji Hyuk.