Ujigami strikes again! The mysterious new villain has claimed another victim in their drive to make the city "safe" at any cost. While the Turtles still struggle to get any upper hand on their new adversary, Donatello has suspicions about their true identity that may mean a whole new set of problems for our half-shell heroes. Trying to get ahead, the Turtles set a trap using Ujigami's likely next victim as bait: the leader of the Foot Clan, Karai!