Junpei, a low level gangster, is in over his head when he decides to steal a large sum of money from his Yakuza boss. It doesn't take long for the Yukuza to figure things out and dispense with a severe beatdown. Fortunately for Junpei, cops break up the fight before he reveals where the money is stashed. And instead of being beaten to death, he ends up in jail for five years. But when he gets out, he needs constant protection.
Enter Naoto Kiba. He's an invincible bodyguard for hire - just what Junpei needs to recover his money, rejoin his girlfriend and, hopefully, make a safe escape. But Kiba has his hands full with this assignment as he is constantly putting his fighting skills to the test.