To raise money for surgery for Yang Linlin, the disabled girl he has a secret crush on, Peng Zhanxin borrows 100,000 yuan from his friend Li Bo. But because he doesn’t explain what the money is for, a misunderstanding arises. Furious, Li Bo proposes a “living coffin” wager: if Peng Zhanxin survives three days inside a coffin, his debt will be forgiven. Peng Zhanxin willingly gets in, but Zhang Chaoran, who is also in love with Linlin, secretly closes the coffin and buries him alive. After sobering up, Li Bo discovers the truth and helps Zhang Chaoran bury the body. Later, he finds a surgery appointment slip at Peng Zhanxin’s home and finally understands his good intentions. To silence Li Bo, Zhang Chaoran lures him into a living coffin and kills him. At last, Zhang Chaoran discovers that Li Bo had prepared a diamond ring to bring him and Linlin together, only to learn that Linlin has a boyfriend. He completely breaks down.
