A group of passengers on a bus, including a driver, an insurance salesman, and various other characters, find themselves trapped in an endless loop inside a dark tunnel after taking a detour. As they try to escape, they encounter mysterious rooms with clues and face their own fears and dark sides. The story intertwines with the subconscious mind of a serial killer, where personalities clash and secrets unravel in a desperate search for an escape and answers to personal traumas. The narrative culminates in a psychological battle within the killer's mind, revealing deep-seated traumas and leading to a dramatic conclusion that leaves the fate of some characters uncertain.
Here are the key facts extracted from the text:
1. A bus driver takes a detour through a tunnel with several passengers.
2. The bus becomes trapped in the tunnel, and the passengers try to find a way out.
3. They discover that the tunnel is endless and seems to be looping back on itself.
4. The passengers start to turn on each other, and some are killed or injured.
5. A mysterious person appears and kills one of the passengers.
6. The remaining passengers find a room with a calendar and a television showing a woman trapped in a cave.
7. They discover that the tunnel is actually a representation of a serial killer's mind.
8. The serial killer, known as "Show," is a tunnel engineer who created the tunnels as a representation of his own mind.
9. A psychotherapist named Chen enters the killer's mind to try to find the location of his wife, who is being held captive by the killer.
10. Chen discovers that the killer's mind is represented by various personalities, including a driver, a pregnant woman, and a set of twins.
11. Chen tries to communicate with the personalities to find clues about his wife's location.
12. He discovers that the killer's childhood traumas led him to hate married women and kill them.
13. Chen finds the coordinates of his wife's location, but they are taken away by the killer's personality.
14. Chen defeats the killer's personality in a mud fight, but another evil clone appears.
15. To save his wife, Chen decides to eliminate himself, which causes the evil clone to disappear.
16. The killer, Show, wakes up from his coma and reveals the location of Chen's wife.
17. Chen's wife is saved, but Chen is left in a coma, wandering alone in the tunnel.
18. The bus appears in front of Chen, but it is unclear who is driving it.