Casey Jones has had a tough life. Mom dead from cancer when he was just a teen; father an abusive, drunken wreck; his best friends a bunch of mutant ninja turtles embroiled in a centuries-old clan war. Yeah, it's been a rough ride, and along the way, Casey's learned one important lesson: monsters come in all shapes and sizes. And they must all be stopped. Now, when the maniacal Rat King's latest gambit, the Armageddon Game, threatens those closest to his heart in their own home, Casey Jones dons his hockey mask and prepares for his most dangerous battle yet. But that's okay... He's not afraid of monsters.