Terry Tsurugi, a martial arts master, is a mercenary for hire who lives by his own code. Early in the story, he is approached by the mysterious Junjo, who seeks his aid in freeing a fellow prisoner from death row. When Terry's fee isn't met, he instead aids in orchestrating Junjo's escape while betraying his employer. This brutal betrayal sets off a chain of intense combat and mutual vendettas that establish Terry as a fierce and cunning fighter. He then takes on another lucrative job - the protection of Sarai, a wealthy heiress targeted by the Yakuza for her inheritance.

As Terry defends Sarai from various assassination attempts, he becomes entangled in a deeper conspiracy involving corporate espionage and organized crime syndicates. His unyielding combat prowess is tested repeatedly as he faces off against numerous adversaries, each more formidable than the last. Struggling between his mercenary ethics and personal honor, Terry’s journey is fraught with violent clashes and moral dilemmas that reveal the complexities of his character. His decisions ultimately lead to an explosive confrontation that reshapes his fate and redefines his place in the martial arts underworld.