When a battle between the Purple Dragons and what appear to be the Teenage Mutant Ninja Turtles is captured on film, the Turtles are quick to refute their master Splinters accusations of carelessness. Breaking into the Purple Dragons headquarters to get to the bottom of these mysterious dopplegangers, our Turtles discover that their impostors are, in fact, versions of them from another dimension. The goofy otherdimensional 1987 Turtles prove to be a hassle for the more seriousminded 2003 Turtles, but they are soon able to discern that they were teleported into their world in a dimensional portal accident that has also brought their archenemies, Shredder and Krang, and their battle fortress, the Technodrome, along with them.