On a dark night, in an endless desert wasteland, a raging storm will completely isolate a motel standing in it from the outside world, with roads blocked and communications interrupted.

Ten strangers who had never known each other before were forced to gather in this shabby motel. Larry is the owner of this motel. He behaves strangely and seems to hide many secrets. Ed used to be a policeman and now drives a private car for actress Caroline Susan. They hit Alice on the road and had to send her to this motel for treatment. Alice, her husband George, and their son Timsey were driving when their car suddenly had a tire puncture. When they got out of the car to check, Alice was hit by Ed's car. Paris is a prostitute. When she was looking for a lighter on the way, she transferred a high-heeled shoe out of the car. As a result, it was this high-heeled shoe that caused Alice's car to have a flat tire. Ed wanted to find a doctor. On the way there, he met Lu and Gini. Because the rain was too heavy, they had to return to the motel. Officer Rhodes escorted a prisoner into the hotel. These 10 people were divided into different rooms, and they all had room keys with numbers.

Something terrible happened soon after. Actress Caroline Susan died in the laundry room. And she also has a room key with No. 10 in her hand. Later, Lu was stabbed to death, and he had a room key with No. 9 in his hand. Everyone couldn't help but worry a little, whether they would die in this order. They also discovered that they had a lot in common: each of their names had a word representing a state in the United States, and their birthdays were both on the same day. The results confirmed their suspicions. The prison inmates, George, and Alice and Genie all died one after another, in that order. And Paris found a criminal certificate in the police car, proving that Rhodes was not actually a policeman. He and the fugitive killed the policeman and pretended to be a policeman. After Rhodes found out, he wanted to kill Paris and silence him. He killed Larry and injured Ed. Ed killed Rod at the last moment. In the end, only Paris survived.

But in fact, none of these exist. These 10 people are all 10 split personalities of McCann Reiff. These 10 personalities alternately control his body, and the evil personality formed when McCann Reeve was abused by his prostitute mother when he was young brutally murdered six people in a motel four years ago. On the eve of being sentenced to death, his attending psychiatrist Malick discovered a diary written by McCann Reeve as a child. This diary further confirmed the doctor's theory that McCann Reeve's murder was caused by his schizophrenia. The doctor informed the judge that McCann Reiff was to be arraigned urgently. Dr. Malik and McCann Reiff had a conversation in front of the judge and asked him to pull out the evil personality in his body, so the above story happened. Yes, they are the ten personalities in McCann Reeve's heart, one of which is the evil soul, and that world is McCann Reeve's inner world, so the worldview of this world is slightly different from the real world. The doctor had a conversation with one of the kind and brave personalities in reality, and told the personality the truth and asked him to help McCann Reeve find out the evil personality. Then the good personality and an evil personality died together, and only a female personality escaped from the clutches.

When McCann Reiff was a child, her mother was a prostitute and abused him, so Timsey is the evil soul personality that McCann Reiff cultivated since childhood. At the end of the film, this evil personality kills Dr. Malick and a prison van driver.