A happily engaged couple is put to the test when an unexpected turn sends their wedding week off the rails.

In New York, mysterious radioactive ooze has mutated four sewer turtles into talking, upright-walking, crime-fighting ninjas. The intrepid heroes -- Michelangelo (Robbie Rist), Donatello (Corey Feldman), Raphael (Josh Pais) and Leonardo (Brian Tochi) -- are trained in the Ninjutsu arts by their rat sensei, Splinter. When a villainous rogue ninja, who is a former pupil of Splinter, arrives and spreads lawlessness throughout the city, it's up to the plucky turtles to stop him.