After the Turtles find Bigfoot in the woods, Donnie befriends it and insists they save it from a hunter.
The team discover a Kraang ship buried under April's house, they also uncover April's lost mother.
After he becomes upset, Mikey leaves and befriends a mutant frog he finds in the woods.
Creatures that feed off dreams trap the Turtles inside their own dreams as April and Casey must find a way to wake them up.
When Casey, Raph, Mikey and Donnie are captured by a new mutant, both April and Leo must overcome disabilities in order to save them.
Leo takes the Turtles to train in the woods in an advanced ninja ritual; the Turtles must overcome their weaknesses and face their enemies to become a true ninja.