The Turtles and Mutanimals are caught in the storm of the century; when a new group of sea mutants threaten the city, Raph will be forced to use his words to save the day.

When the Lair floods, April goes to save Splinter, but he won't leave the sewer; to make matters worse, the mutant called Goldfin comes with a warning of staying out of his way, or else.