Zhang Tan, a bigwig in the entertainment industry and a famous screenwriter, inherits a kindergarten that only operates at night. He can't close it down because the children are just too cute! At 00:30 AM, he sees off a tired office worker in a suit picking up his 3-year-old daughter, a bar waiter with a smell of alcohol picks up his sleeping son and walks into the night, a mischievous toddler is still playing games with his pale-faced mother, a cheerful old man with a white beard has already said goodbye to his grandson, and a child with no one to pick him up stares blankly.