Turtles vs. frogs! Will Mutant Town crumble when a territorial new group, the Punk Frogs, challenges the boys for control? With tensions climbing in the neighborhood, can they find their way back to the spirit of the season before disaster strikes? Then, a mysterious new figure arises. Who is Dr. Jasper Barlow and what will some of our heroes do when he makes them an offer they may find hard to refuse... and reveals his most prized creation: Venus?!