Shi Tou, a 16-year-old student sick of studying, envied Da Huang the plough ox for not having to study, and even made a pact with it to swap souls. Expecting to live a carefree life from then on, he instead suffered every hardship after turning into a plough ox, facing death several times. Meanwhile, Da Huang went to school in the boy's body and even achieved astonishing grades. With the five-day pact about to end, what kind of price will this absurd exchange make him pay?