At first Mon is a violent killer faithful only to his own eruptive desires. He meets Toshi, the exact opposite of himself. After they spend a long time together and Toshi becomes more and more like Mon and even more evil, he collapses and is no longer able to kill. Almost at the same time he meets Maria and starts to grow strong feelings for her. Because of Maria, Toshi starts to distrust him but even in his weakened condition Toshi is no match for Mon.