Description：Detective Zheng Taixiu (played by Zheng Douhong) of the Seoul Serious Crime Unit received the news of the death of his friend Wu Wangcai, so he rushed back to his hometown that he had not been close to for ten years. At the funeral, Zheng Taixiu reunited with his old friends Zhang Bihu, Donghuan and Shihuan (played by Yoo Seungwan). It turned out that the five of them were good friends during their school days. Zhang Bihu, who was already the boss of the gang, vowed to avenge Wangcai, and Zheng Taixiu also felt that Wangcai's death was not as simple as a gangster's trouble. Zheng Taixiu and Shihuan, who were investigating the cause of Wangcai's death separately, were each intercepted by a gang of young people. After a fight, they were spared, but the two gradually touched the truth behind the scenes. It turned out that after Wu Wangcai handed his gang over to Zhang Bihu, the village where they lived was designated as a tourism development zone. The greedy Zhang Bihu colluded with Seoul forces and tried to encroach on the villagers' land.