At 6:30 in the evening, the last bus carrying nine passengers slowly entered the cross-river bridge. No one noticed the driver's frequent glances at the rearview mirror, and no one noticed the strange smile on his lips.
The passengers in the car had their own thoughts: a taciturn middle-aged man clutching a shabby envelope; a young girl who kept checking her mobile phone with a panic expression; and an old woman muttering a spell that no one could understand. When the bus suddenly accelerated towards the guardrail, only one person showed a relieved smile.
Three days later, the driving recorder recovered showed that the driver whispered: "It's time" before falling into the river. The survivors' memories pieced together a more terrifying truth - each passenger was related to a bizarre murder three years ago. The driver was the only "survivor" in the tragedy.
As the police investigate further, a dark plan about revenge and redemption gradually emerges. The final twist will reveal that this seemingly crazy falling into the river was actually a carefully planned "trial".