A medical graduate who is about to graduate experienced a hangover the night before his birthday. When he opened his eyes, he found himself trapped in a coffin and brutally buried alive, with a complete human skeleton beside him. Just as he was panicking, the phone rang and he found himself stuffed with a function phone that couldn't access the internet in his pocket. The person on the other end of the phone warned him not to call the police, otherwise his most secret would be revealedOnly by following instructions can one survive, and this phone can only answer, not make calls. He conversed with the mysterious kidnapper through this phone and launched a self rescue operation in a small space. And on the other end of the phoneThe mysterious person seemed to want to put him to death, leaving him with no chance of escape. Who is going to put him to death? With a one and a half foot wide coffin and little oxygen left, can he ultimately escape from life?The truth is shrouded in mist, does he deserve to die? Will it die? Interrogating you, me, his conscience