Shi Xiaoxiao was a high school student. When attending a funeral, he suffered from tinnitus and dizziness. When she woke up again, she found herself in another world.
She didn't have amnesia, but she couldn't remember whose funeral she attended before she came to this other world.
This otherworldly world was dark and humid, and was a passage similar to a sewer. She heard something non-human in the passage chasing her.
Shi Xiaoxiao, who escaped the disaster, later met two boys from the same school and found that they were being chased by another smelly thing. They walked together and began a terrifying escape.
While escaping in the passage, Shi Xiaoxiao was chased by the footsteps and saw the thing chasing her. After that, she was taken away from another world, which was the second layer below the passage world.
In this world, she saw her dead friends and classmates...