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 adorable! At 00:30 AM, he sees off a tired salaryman in a suit picking up his 3-year-old daughter, a bartender with a hint of alcohol on him carrying his sleeping son into the night, a mischievous toddler still playing games with her pale-faced mother, a cheerful old man with a white beard saying goodbye to his grandson, unclaimed children gazing longingly at the gate, and a sharp-tongued but kind girl with a Texan accent who decides to stay here permanently. A kindergarten that operates late into the night, a heartwarming story of everyday life.