Well, it's a passenger with a cat in his bag. The man in black named Lu Di has been sitting in the last row of the bus. Carrying a big schoolbag in front of him, he carefully protected the schoolbag, not letting anyone near or touching anyone. He is a very cautious young man.

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The murderer at the beginning is not the man in black behind the car, but the woman Tao with the pressure cooker and the bus driver Wang Xingde.

Wang Xingde, a bus driver, and Tao, a woman holding a pressure cooker, are a couple. Four years ago, their only daughter suddenly asked to get off the bus when she was taking the No.45 bus. The driver put her on the bridge, and as a result, her daughter was crushed by the muck machine when she crossed the bridge and died on the spot. Tao was deeply hit and asked the police to investigate the reason why her daughter got off the bus halfway and to confront the driver. The bus company concealed the driver's information, and the cowardly Wang Xingde signed a mediation book and returned to his hometown with his wife.