While on the lookout for treasure ships, the Sea Wolf pirates encounter a tattered galleon adrift on the Caribbean Sea. When they board, they find only one crew member left - and he explains that his ship was attacked by a giant, tentacle-ridden sea monster!

When the monster suddenly appears and attacks the Sea Wolf, Sam and Fernando are swept overboard! Can they escape and defeat this new threat or are they destined to become fish food?

Jan Burchett and Sara Vogler, illustrated by Leo Hartas