Episode 1

In the summer of 2005, a meeting takes place at the middle school of a small seaside town ahead of summer vacation.

Episode 2

Zhang Dongsheng looks guilty as he is questioned by the police. The three kids decide to remind the murderer about what they know, and send a warning letter.

Episode 3

Zhu Chaoyang takes advantage of Zhang Dongsheng's carelessness and plants the warning letter; Zhu Jingjing convinces Pu Pu to stop bullying her.

Episode 4

Zhang Dongsheng confirms that the children have video evidence of the crime after following the trail of the warning letter.

Episode 5

Wang Yao visits Zhu Chaoyang's home, and Zhu flees in fear that he knows he was responsible for the death of his daughter.

Episode 6

Wang Yao is desperate to find out the truth, and will stop at nothing; Yan Liang goes to the secret meeting place and finds Lao Chen waiting for her.

Episode 7

Father Zhu starts swimming with Chaoyang to make up for his lost father and son time; Zhu Chaoyang goes to Zhang Dongsheng's home to negotiate terms of peace.

Episode 8

As the crime continues to ravage the town, the children grow more and more impatient with the suspects and take matters into their own hands.

Episode 9

Wang Yao's younger brother takes Zhu Chaoyang to the fishery to torture him for information; Zhang Dongsheng fights with Wang Li as he asks for money.

Episode 10

Zhu Ma asks the police about Zhu Chaoyang's situation, and she discovers she's been lying; Zhang Dongsheng feels betrayed by Yan Liang yet again.

Episode 11

Zhang Dongsheng, Yan Liang, and Zhu Chaoyang make a lucrative deal; Wang Yao and Zhu Yongping stumble into an unfortunate situation and violence ensues.

Episode 12

Yan Liang and Zhu Chaoyang finally decide to take down Dong Sheng; Zhu Chaoyang tells the police what he knows and starts from the beginning.