Former mechanical engineer Chen Mo's strange experience after boarding the mysterious "perpetual train" on a rainy night in search of his sister Chen Xi, who has been missing for six months. This train running on abandoned railway tracks is full of weirdness caused by the confusion of time and space: the disappeared passengers are bound by obsession and repeat the cycle of death in the carriage; each carriage corresponds to a sealed supernatural event, from the curse in the mirror to the phantom in the foggy forest, which hides secrets that span the ages.
Train conductor Li Ningxia sets a rule: break through the five-car test within 72 hours, otherwise you will become part of the train forever. Chen Mo met Lin Xiaoman, who could sense obsessions, on the train, and the two worked together to solve the mystery of the carriage - from the suicidal ghost wearing a cheongsam in 1943 to the old man who was wronged due to misdiagnosis in 1976. Each time he solved the root cause, he was one step closer to the traces of his sister.
As he went deeper, Chen Mo discovered that his sister's disappearance was related to the train's "perpetual motion core." This machine, powered by the fear of the living and the obsession of the dead, is being eroded by the "Lord of the Void", and my sister actually voluntarily became a sacrifice to maintain the core. In order to break the cycle and awaken his sister, Chen Mo and his partners collected scattered gear fragments, awakened the spiritual powers of past passengers, fought against the minions of the void in the folds of time and supernatural illusions, and tried to use "hope" as fuel to rewrite the fate of being swallowed by the train.
The gears of the train never stop, carrying the cycle of sacrifice and protection. Can Chen Mo uncover the secret of the pocket watch left by his sister before time runs out? This redemption that spans life and death will eventually find its answer on the ever-moving railway track.
