Campeón has always wanted to be a great hero, like the legendary cats of El Morro in Old San Juan. Sadly, the world no longer needs fierce swashbucklers or acts of derring-do, and the cats of El Morro barely remember their legacy. This all changes when Campeón stumbles upon a band of time-traveling pirates digging for a treasure map in a mysterious mangrove forest. He soon discovers that they are crew members of the evil pirate Captain Kitty the Kid, who is on a mission to conquer El Morro, vanquish the Cats of the Wall, and steal a magic suit of armor buried within a long-forgotten part of the cat kingdom. Campeón and his friends must work together to stop the pirates and test the strength of their courage when all seems lost.