Raph, Leo, Mikey, and Donnie are becoming the heroes they are destined to be. But nothing can prepare them for what they face on, and below, the streets of NYC, where they discover a hidden mystical world and wield brand-new, powered-up weapons. The Turtles face formidable foes, battle bizarre mutants, wrestle a heavyweight champ, and still make time for the best pizza in the city!