Kurosa Masao (Shota Sometani) is a gangster living at the bottom of society. He has no relatives, no household registration, no job, and is as humble as an ant in the cracks. One day, Masao witnessed a man named Ebisu Daikichi (Kiyohiko Shibukawa) hiding a mysterious package in a locker, and took this as an opportunity for his fortune to turn. Masao snatched the package, but found only a cold hard drive inside. In fact, the hard drive stored this amazing secret, which led to Masao being hunted down by the underworld and eventually becoming a prisoner. In prison, he met a prostitute (Erina Mizuno), and the two decided to join forces to escape. With the help of Masao's friend Inogami Rakuhiko (Atsushi Murakami), the two gained a short period of freedom, but were soon caught again. This time, they had to face the ruthless killer Senju Kan (Tsuyoshi Ayano).