When four petshop turtles are exposed to toxic ooze, they are transformed into turtle fighting machines. The four--Leonardo, Donatello, Raphael and Michaelangelo--are trained as ninjas by their rat-like mentor, Splinter. Together, with the help of their report-friend April, the turtles fight the forces of evil, such as Krang, Shredder and his foot ninjas... and eat a lot of pizza in their off time.