Four turtles and a rat are transformed into a humanized state by a mutagenetic gel called Ooze in a sewer. The rat becomes their mentor, and teaches them all he knows regarding Ninjitsu. The turtles use their newfound skills to combat the crime in New York City. But when their mentor is captured by an enemy from the past, Oroko Saki also known as the Shredder. Now can the turtles hold true to what they've learned, and stay together as a brotherhood?