Chen Jianguo, a middle-aged deliveryman who was in desperate situation to raise money for his daughter's surgery, signed a contract marriage with a wealthy daughter who wanted to escape from a family marriage. He moved his daughter into an old community, thinking it was just a cold transaction, but he was inadvertently healed by the breakfast stall downstairs, the warm care of his neighbors, and the home-cooked dishes his "wife" quietly learned to make. When the family exerts pressure and real difficulties follow one after another, the fireworks in the whole building become their strongest shield. This is a marriage that started with a transaction, but ended with two people holding hands in the lights of thousands of homes.