The mask comes off! When Speed Racer crosses paths with the mysterious Racer X, sparks fly on and off the streets in a high-octane showdown that pits brother against brother...even if neither of them knows it yet. But when the Mach 5 is stolen—with Spritle and Chim-Chim trapped in the trunk—Speed and Racer X must team up to take down a criminal biker gang led by the deadly Ace Deucey. Buckle up for wild stunts, emotional gut-punches, and the beginning of a bond that could save Speed's life...if it doesn't wreck him first!