Description：Sangxian (Song Kanghao) runs a laundry shop, but unfortunately the business is slow and he is heavily in debt. His good brother Dongzhu (Kang Dongyuan) is an orphan himself and works for a "baby storage box" agency. On a rainy night, they secretly took away the baby boy in one of the boxes. The next day, the young mother Soyoung (Lee Ji-eun) came to the door and asked to take back her child Woo-sung! She wanted to call the police, but Soyoung finally agreed to let the two "middlemen" find better parents for her son, and decided to follow them. On the other hand, detective Soojin (Bae Doona) and her junior Detective Lee (Lee Joo-young) have been following them, secretly collecting evidence, and are determined to pull people to convict the case! The plot is triggered by the baby in the temporary storage box, involving 5 key people around, and embarking on an unexpected and unique journey, touching the most subtle worldly feelings.