Gong Ji-Hyeok (Jang Ki-Yong) 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, Go Da-Rim (Ahn Eun-Jin), suddenly kisses him. This places him in a difficult position, because she is a married woman.

Meanwhile, Go 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 Gong Ji-Hyeok works. She lied about her background and stated she was married with a child to get hired there. She now works under Gong Ji-Hyeok on the Mother TF team. Her only interest is to become a permanent employee there, but she begins to have feelings for Gong Ji-Hyeok.