Giba (Ryo Yoshizawa) and several of his colleagues work at a revenge agency. A mysterious girl called "Taker" leads the group. Giba lacks emotion for a person. The revenge agency takes on revenge requests on behalf of their clients. Their clients include a woman who is a victim of a fraud marriage and the family of a victim killed by a serial murderer.

The yakuza have their best days behind them and are only a shadow of themselves. The old rituals seem out of date and their tattoos make them outcasts of society. The inexperienced student Ryō stumbles into their ranks by chance, and before he knows it, he becomes entangled in dark machinations. He quickly succumbs to the fascination of omnipotence fantasies and hedonistic decadence and sinks deeper and deeper into a parallel world of prostitution, blackmail and violence. However, there is one thing that Ryō has not considered in his naivety: once yakuza, always yakuza!

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