A train coming in the dark is never a place of salvation.
At every platform, there are hidden obsessions and resentments left by countless dead souls; every rule is like an invisible boundary. One wrong step will lead to death.
Passengers were forced onto the bus with no way out and no answers. People around you will turn against each other at any time, and every choice may lead to an irreversible ending.
In this dilemma of endless reincarnation, only Xiao Jin and Gu Han are always side by side. One person hides the long past, and the other person keeps a keen intuition about the rules. They have seen people's hearts destroyed and survived countless death eliminations. They broke through the situation in the darkness and uncovered the real truth behind the train step by step.
This is a journey without redemption, only struggle. They must complete this journey to understand that life is a trial that keeps moving forward.