Rainbow Dash is in desperate need to earn money to help a dear friend. And she finds just an opportunity when she hears about an underground racing circuit, offering an enormous cash reward to the ultimate victor. Little does she realize that this circuit involves the most dangerous racing pegasi in Equestria, and the most deadly courses that could spell a cruel fate for a clumsy flyer. No doubt Rainbow can fly fast. But can she fly smart in this terrifying and life-staking race for glory, and more importantly, for her loyalty?