At every turn, the Teenage Mutant Ninja Turtles have thwarted Kraang Primes plans to terraform the Earth into Dimension X. Whats an evil overlord to do? Hatch a nefarious new scheme, to create an army of Ultra Mutants! Everywhere, the Kraang have kidnapped mutants - including the Ninja Turtles - for their DNA!\rbr\rbrWith his brothers pulled through a Kraang Dimension X portal, Leonardo must recruit the Ninja Turtles allies and foes alike before its too late.