大空银行是一家大银行,区域分行长野崎修平(织田裕二)被银行提拔到监査的位置,将来有机会进入高层。而他现在的工作,就是找出银行内各种不正当行为。他所面对的是,银行行长京极雅彦(古谷一行),京极的得力助手 武田真吾(岸谷五朗),以及具有野心的菁英银行员 立川祥子(松嶋菜菜子)。面对银行内的巨大黑暗,野崎修平能否坚持他的正义?Shuhei Nozaki is a branch manager at Oozora Bank. People like him because of his sense of justice and humanity, but he doesn't have a successful career at work. One day, the branch where he works closes. Shuhei receives a promotion and works as an auditor. Working as auditor, he sees corruption and decides to change the bank. He faces opposition from all the way at the top of the company. The CEO, Masahiko Kyogoku , and his associates, Shingo Takeda and Sachiko Tachikawa, try to stop Shuhei.