The Nearly Fearless Monkey Pirates sail to a secret treasure island where they come face-to-face with pirate ghosts! Will they escape, or will they walk the haunted plank?

While searching for undersea treasure, Captain Banana Beard and the Nearly Fearless Monkey Pirates find Neptune's Trident, which is cursed, and are immediately attacked by zombie mermaids.

When his crew expresses doubts about the existence of the octo-shark, a creature that is half octopus and half shark, Captain Banana Beard of the Nearly Fearless Monkey Pirates and his crew set out on a hunt to find the mythical monster--but the search nearly turns all of them into an octo-shark lunch.