From the back cover:
Tired of your typical train-throwing, city-smashing, superhero showdown? Had enough airborn autos and falling buildings to make you want to hang up the ol' super cape? Well, leave DC, NY, and LA behind. . . and plunge into the depths of aquatic action!
That's right - superheroes are taking to the water!
Scourge from the Deep overflows with rules for practically every aspect of underwater gaming: skills, powers, special effects, gadgets, and hazards. This Hero supplement also offers a complete below the waves adventure that will toss your heroes about with ten of the most vengeful villains you will find on any part of the planet. Detailed descriptions of three salty organizations spice up this already hot supplement.
So hold your breath, dive into the big blue, and take on some real slime balls as you become entangled in a turbulent criminal plot.
What's the matter - afraid of the water? Last one in is a rotten hero.