After escaping Tomator in The Lost Vikings, Erik the Swift, Olaf the Stout, and Baleog the Fierce settle into joyful, fruitful Viking lives. Then one day, returning home from a fishing trip, the three are captured by Tomator once again. Tomator summons a robotic guard to throw them into the Arena, but a system failure strikes first. During the resulting blackout, the Vikings dismantle the robot piece by piece, donning its parts to gain new abilities — only to be accidentally hurled through time once more. Now equipped with their new robotic gear, Erik, Olaf and Baleog must work their way through each level to find their way back home.