The heroine Anna is not dead. In fact, there is a foreshadowing in the film more than once, that is, the undertaker often injects Anna with liquid medicine, saying that it is to relax her muscles and make her body soft. In fact, according to common sense, everyone can know that after death, her heart stopped beating. Without the power of the heart, the blood circulation in her body naturally stopped. So how does the liquid medicine injected from her neck circulate throughout her body? How can the whole body work? It works, which means Anna is not dead. And the injection always happens before someone comes to see the body. Of course, another foreshadowing is that when Anna looked in the mirror for the first time, she formed an atmosphere on the mirror. Obviously, only the living can breathe out hot air, which condenses into water mist on the mirror.

In order to confuse the audience and hide these foreshadowing, the director deliberately created some puzzles. For example, Anna can't feel the pulse and pain after waking up. This is actually not contradictory to the previous foreshadowing. The undertaker can slow down the protagonist's heart rate by injecting drugs. Her pulse becomes Microsoft, so she doesn't feel pain.

The final ending tells us that this is a suspense horror film, and the people who are not dead actually gradually accept the "reality" that they are dead under the guidance of the undertaker. Why did the undertaker do this? Why "kill" the living? It has been said in the film: repeat the monotonous life every day like the protagonist, neither dare to accept love nor dare to refuse love, so what is the difference between living and dying? Without pursuit, you can't feel happiness, so living is like walking dead, but it's better to die. Everyone is afraid of death, but in fact they are more afraid of living. The undertaker made Anna understand how lifeless her previous life was and gave her a chance to start over, but Anna hesitated and thought it was better to accept death. Finally, when Anna realized that she was not dead and wanted to live, I'm sorry, it was too late and there was no chance.