When Splinter is kidnapped, the Teenage Mutant Ninja Turtles search for clues across NYC to try to find their master. With all signs pointing to the nefarious Foot Clan, April and Metalhead analyze artifacts recovered by the brothers to help zero in on where Splinter is being held. However, as the gang gets ever closer to Splinter's location, they start to uncover an even greater threat working from the shadows!