Michelangelo, Donatello, Leonardo, and Raphael return to battle bigger, badder villains, alongside April O'Neil (Megan Fox), Vern Fenwick (Will Arnett) and the hockey masked vigilante Casey Jones (Stephen Amell). After supervillain Shredder escapes custody, he joins forces with mad scientist Baxter Stockman (Tyler Perry) and two dimwitted henchmen, Bebop (Gary Anthony Williams) and Rocksteady (Stephen Farrelly), to unleash a diabolical plan to take over the world. As the Turtles prepare to take on Shredder and his new crew, they find themselves facing an even greater evil with similar intentions: the notorious Krang.