On a monster movie the Teenage Mutant Ninja Turtles are watching, Count Dracula, the Gill-Man, the Wolf Man and Frankenstein's Monster approach a creepy castle. Inside, Doktor Z has finished creating his new bride, whom he intends to force to love him. Suddenly, the quartet of monsters begin banging at his door. They break down the door demanding the doctor let her go. Suddenly Krang blasts the Ninja Turtles television with a mutating ray causing the monster Monsterex, which is composed of different monsters, to appear with among other things the head of Frankenstein's monster.