The arrival of the Frog punks is putting a strain on the balance of the mutant neighbourhood. Between newcomers and new threats, Turtles struggle to keep the city under control! The absence of Master Splinter is cruelly felt during the holidays. And who is therefore the mysterious Dr Jasper Barlow? The latter proposes to the mutants to regain their share of lost humanity. But behind this tempting proposal are sinister designs. At the same time, the future of Triceratons and Utroms is about to change forever...