The Monster Squad is sent to Monsteropolis, a city inhabited by monsters that lies underneath Manhattan, when they hear that Dracula has returned, this time with a plan to give humans a reason to fear Monsters once more. In the meanwhile, the squad is stationed in the headquarters of Monsters Incorporated, the prime facility for scream energy in the prime of the monsters reign of terror. But little do they know that there is also a conspiracy with the walls of Monsters Inc. Now with new members at their side, the Monster Squad is prepared for just about anything thrown at them.