Claremont Moloch (Joseph Maher) is a professional physician, but his specialty is not to save people, but to inflict pain on people. He works for US government agencies, specializing in dealing with so-called "troublemakers" and is extremely ruthless. His victims made several attempts to assassinate him, but all failed. Professional killer Holland (Charles Bronson Charles Bronson) initially refuses the assassination mission in the name of retirement after hearing that his friend was killed under his hand, but he finally changes his mind and makes a resolute move. He approached Clement in the guise of a woman and a girl disguised as a family, and they happened to be the families of friends who were killed. Clement was heavily protected, so Holland had to think of ways to wipe out his guards one by one.