At the end of 2010, Weihai was feeling very cold.One evening, Ni Xiangdong was entrusted by his brother Cao Xiaojun to secretly deliver an old wooden box to Fufeng Mountain in an old van.The north wind was biting, Ni Xiangdong dragged the box into the abandoned house, and then dialed Xiaojun's phone, and the ringtone came from the box.Ni Xiangdong opened the door and unexpectedly found Xiaojun curled up in blood, motionless.At this moment, a white light flashed outside the door, and a stranger secretly filmed the scene.

Ni Xiangdong chased him to no avail. Suddenly the police siren approached, so he had to sneak into the dense forest with his suitcase on his back.After finding a safe place and opening the box, the person in the box turned into a young security guard. The security guard asked for help in panic.With the blood of the past surging in his mind, Ni Xiangdong picked up the rock and smashed the security guard to death.At the same time, residents of Tongzi Building called the police saying that half of their ears were hooked out of the sewer.Criminal investigation captain Meng Chao and newcomer Tong Hao entered the building to investigate.

During the investigation, Meng Chao noticed that resident Wu Ximei was acting suspiciously and proposed to enter the house for inspection.During the interrogation, the police learned that Wu Ximei's family had a close relationship with Ni Xiangdong, and that a wooden box was missing from her home.At the same time, neighbor Li Qingfu also testified that he had witnessed Ni Xiangdong leaving Wu Ximei's home with his suitcase in the afternoon.Meng Chao chased him up the mountain based on the license plate clues, and Ni Xiangdong managed to escape by pretending to be an injured security guard.

Late at night, Wu Ximei calmly cleaned up the traces in the house; when a man entered, she admitted that she might have been exposed in front of the police. The child's natural protection could not be cured without his father, and she urged him to protect himself.When the man left, he was recognized by the drunk Li Qingfu downstairs and silenced him.