While constructing a ship in a bottle, the penguins learn from Phil and Mason that their design is of a Norwegian fishing vessel which sunk 100 years ago in the New York Bay having a capture of brined herring. The team then sets off to find the actual wreck via submarine and works in yielding a crate of century-old fish, which Skipper, Kowalski, and Private quickly take in the contents of as Rico struggles and doesn't get to eat some himself. Regrettably for the 3 fish-eaters, the herring causes a 24-hour fish-craving psychotic state, which threatens to turn into permanent if any further fish is eaten prior to the condition wears off. Rico then works to avoid his teammates from consuming any more fish.
