The Nanorace group, residing in a futuristic world, faces discrimination from the "Purerace" sect who consider themselves normal humans. Beck, a renowned hunter with the extraordinary "Red Ash" ability, undergoes surgery to become part of the Purerace. He, along with Tyger- a timid mechanic, uses their parallel machine to take down dangerous jobs in the old world. Their paths cross with Call, a girl running from the grasp of Safari and Stripe. Together, they traverse to the clockwork world, fending off persistent attacks from Safari and Stripe. The leader of the chasing pack- Deny, also joins the hunt against Beck and his companions.