From publisher blurb: Snakes are bad news at the best of times, but nobody wants snakes in their submarine. Nobody but a Director of They Came From Beneath the Sea!, that is! Embrace the havoc of a snake-filled submarine with this fully playable They Came From Beneath the Sea! scenario, which includes: Five playable protagonists to DIVE DIVE DIVE right into the action! Three nasty reptilians representing different snakey threats! A full plot to explore and run, perfect for one-shots and convention play!