Ralph is tired of being overshadowed by Fix-It Felix, the 'good guy' star of their game who always gets to save the day. But after decades doing the same thing and seeing all the glory go to Felix, Ralph decides he's tired of playing the role of a bad guy. He sneaks into the game with a simple plan, win a medal, but soon wrecks everything, and accidentally unleashes a deadly enemy that threatens every game in the arcade.