Deliveryman Cao (Cao Jianguo) and his son Cao Ze, a ninth-grader, have been estranged for years. After an argument ends with an electric shock, they unexpectedly switch bodies. Forced to take each other's places, Cao causes a school scandal over a supposed teenage romance, only to learn that his son has secretly been trying to set him up with a woman who lives alone. Meanwhile, his son takes over his delivery route and even takes it upon himself to get hemorrhoid surgery. This bizarre body swap helps father and son understand the care hidden beneath each other's silence, and at last, long-overdue understanding fills their hearts.
