After an army of Infected swarmed New York City and everyone evacuated the city the Ninja Turtles along with April O'Neil Master Splinter Bebop Rocksteady Mondo Gecko Wingnut Genghis Frog Leatherhead Ray Fillet Pigeon Pete Scumbug and Metalhead meet a blue hedgehog named Sonic who tells them of a place he calls Tomorrow they must now go there for a temporary home until the infected are gone but the journey will not be an easy one