Zhang Tan, a renowned top-notch screenwriter in the entertainment industry, inherits a nursery that only operates at night. Despite his initial intention to close it down, he finds it impossible to do so because the children are just too adorable... At half past midnight, he watches as a tired salaryman in a suit picks up his 3-year-old daughter, a bartender reeking of alcohol carries his sleeping son into the night, a mischievous baby continues to play games with a pale-faced mother, a cheerful old man with a white beard bids farewell with his little grandson, and an unclaimed child gazes wistfully.