The game begins with Dexter's rival, Mandark, breaking into Dexter's laboratory and attempting to destroy it by reprogramming the lab's Computer to block Dexter from entering. This works, and Dexter is unable to enter without the right password to which he has to mimic Mandark's voice. After retrieving his voice-modulating invention from Dee Dee's cootie-ridden room, he has to dance with her in order to convince her to guess the password. Acquiring it, he successfully gets into the lab.