The gangster boss "Principal" wanted to quit, but was betrayed by his girlfriend's sister-in-law and his subordinate Yi (played by Wu Qingzhe) and was hunted down. "Principal" told his granddaughter Xiaoyu the password of his Swiss bank and gave her two half-cut US dollars, claiming that if she sent them at a critical moment, she would be protected by the legendary figures of Jianghu, Sharpshooter and Mastermind. In order to obtain the huge sum of money from the "Principal", Yi cooperated with the overseas boss Zhong Shengyi (played by Zeng Zhiwei), killed the "Principal", and searched for Xiaoyu's whereabouts; the police sent rookie police officer Wang Xiaofei (played by Alex Fong) to protect Xiaoyu, and Xiaoyu also sent a letter for help. So, Mastermind (played by Anthony Wong) and Sharpshooter (played by Francis Ng) returned to the arena. In addition to fighting wits and courage with Yi, they must also always be vigilant against the dangers around them...