When two Mabu disappear in the Underworld, Fiesta and his amigos travel deep into dark tunnels of their old home, where they find themselves face-to-face with a robot army lead by Count Moneybone.

Eye-Brawl sneaks into Captain Blubberbeard's ship, but can the brothers defeat the captain and stop the factory before Skylands is submerged underwater forever?

After being captured by the evil Lord Spellslamzer and discovering the Skylanders they're tasked with finding are working for Spellslamzer, tensions run high as Superchargers Nightfall, Spitfire, and Stormblade struggle to find harmony and work together to escape their magical prison.