In front of the police, Zhang Dongsheng showed a guilty look and completed his performance with “relaxation and restraint.Zhang Dongsheng, who left no criminal evidence, did not expect that his murder process had already been recorded, and the three children were about to have a thrilling confrontation with him.

After much thought, the three children decided to use their own way to remind the murderer and send a warning letter to Zhang Dongsheng.They also found a secret boat in the scrap shipyard that could be used as a ”secret base% for Yan Liang and Pu Pu to temporarily stay.​

Lao Chen, who was on duty at the police station, suddenly received a call from Yan Liang. Yan Liang asked about his father's situation, but Lao Chen did not tell the truth.Lao Chen followed the phone clues to find the Children's Palace and tried to catch Yan Liang. The two almost played a game of cat and mouse.

After a confusing chase, Lao Chen finally caught Yan Liang. While the two were arguing, the Children's Palace was noisy and someone fell from the building.