Da en ung barbar på magisk vis blir fraktet fra fjerne Skullbania, slår han seg sammen med en pussig tredjeklassing for å beskytte hjemlandet mot en ond trollmann.

Denis has a best friend, a cat named Sir Meows A Lot. Unbeknownst to Denis, however, Sir Meows A Lot is a genius with questionable morals - not quite evil, but not exactly nice. However, Sir Meows A Lot has a nemesis: Cucumbers!

Following his father's death, 15-year-old Eli Shane embraces his destiny to follow in his dad's footsteps to a secret, subterranean world called Slugterra where he is determined to be the greatest Slugslinging hero of them all!