Jino, the champion of “Hero’s Cup of Watch-Car Battle League”, receives a dubious invitation to “Ultimate Watch-Car Battle League (UWB)”, which is notorious for extreme level of fight. Jinovisits and gets impressed by the play of Ken. On the way home, Jinois attacked by an unknown group who steals his Watch-Car Bluewill. Jinobarely takes back Bluewillbut comes to know the identity of the evil gang and their conspiracy to take over UWB. He decides to participate the UWB undercover, by name of “Watch Mask” with his Bluewillwith a new name “Blue Thunder”
