The Big Shot is a movie talk about Bincheng, northern China, the present day. Police stake out a market area and finally arrest a coin-counterfeiting gang led by Jia Chao (Liu Tianzuo), who does a deal with the police to help them get a bigger counterfeiter, international criminal Nick. The operation makes a local hero of maverick detective Sun Dasheng (Wang Qianyuan). His wife (Mei Ting) pressures him to enter a lottery for housing in a good area for their young son’s schooling, though he keeps putting it off. At a glamorous showbiz party Sun Dasheng is introduced by a mutual friend (Ma Yuke) to Zhao Tai (Bao Bei’er), the young CEO of property developer Taihua, part of his family’s Zhao Shi Group. The arrogant Zhao Tai humiliates Sun Dasheng in front of everyone when the latter refuses to drink, though Sun Dasheng shrugs it off. Meanwhile, Taihua’s building contractor, Hong Tiejun (Xing Hanqing), has been pressuring people to leave an old area due for development; among them is Sun Dasheng’s friend, car mechanic Chen Yongqiang (Kou Zhenwen), who simply wants his RMB3,800 advance rent refunded. Public protests grow against Taihua, whose share price is already being weakened by investigations into the Zhao Shi Group. Zhao Tai agrees to meet Chen Yongqiang face to face at the group’s headquarters; but he ends up humiliating Chen Yongqiang, who then apparently throws himself down the building’s stairwell and ends up in a coma. Chen Yongqiang’s young son, Chen Xiaoyu (Guo Ziming), thinks his father was murdered and asks Sun Dasheng for help. Sun Dasheng is brushed off by Zhao Tai when he tries to see him, and is later reprimanded for accusing the Guangming district police bureau for not investigating the case properly. Zhao Tai’s oily deputy, manager Cui Jingmin (Wang Xun), tries to buy Sun Dasheng off by offering to help him and his wife find a home in a good area – which only makes Sun Dasheng even angrier. Cui Jingmin also pressures Chen Yongqiang’s wife (Liu Mintao) to a point where she begs Sun Dasheng to drop his investigation. But as the shares of Zhao Shi Group continue to fall, company president Zhao Rongbiao (Gao Jie) is forced to step in.