Go Mifune, a young and upcoming driver, drives a white-body super racing car named Mach 5; Speed enters his first race to win money for his family, against his father, Pops Racer.

Go enters the Sword Mountain Race behind his father's back; Ace and his gang attack the Mach 5, aiming to steal the blueprints of Pops Racer's new engine.

A masked racer, whose identity is in mystery, and whose face is concealed, came to Japan; he was a top racer but was also rumoured to cause car crashes whenever he races.

After being injured in a rain-marred race, Speed is mistaken for The Masked Racer by gunmen from a rival team.

Go tries to help a kind old man find his stolen car; it turns out that the man is the son of a once infamous gang boss, and the classic car he drives has a map to a stash of treasure.

Go and the old man are captured by Blaggard, the boss of a gang; Speed fights back against the thugs and discovers where the treasure is hidden and offers Blaggard a deal.