Gavilan risks his life for a scientist whose book was inspirational to him. Gavilan frees Sarah, a colleague, from the clutches of guerrillas in Africa. At the institute, Sarah explains that her husband is also imprisoned there. She asks Gavilan to free him as well. Together with a dubious mercenary and Sarah, Gavilan sets to work. Along the way, he must eliminate the mercenary, who was working for the guerrillas and wanted to murder Gavilan. Gavilan falls in love with Sarah, even though he knows she is married. Gavilan and Sarah launch a highly daring rescue mission in Africa...

When Gavilan and a friend are unexpectedly attacked by a Yakuza member, Gavilan finds himself wondering, "Why us?" Soon after, he discovers that his friend, Milo, possesses a valuable sword that the Yakuza are also eager to obtain. This revelation immediately plunges Gavilan and Milo into a new adventure. During a confrontation, Gavilan kills one of the Yakuza members, prompting the organization to vow revenge. In an effort to prevent further violence, Milo offers to return the sword to the Yakuza, but Gavilan refuses and insists on a duel with one of their members. Unfortunately, his opponent turns out to be a heavily built giant.