Out in the Wild West, there is a small town called San Mar Valley. When a devious ex-criminal attempts one final heist, a domino effect of everyone's dark pasts come to light, are more entwined than they thought, and might just be the missing pieces they'll need to win and stop the biggest fugitive of the West for good. Welcome to San Mar Valley.

Baekhyun is training to become a pro BMXer in the small town where a vicious motor gang terrorizes the neighbourhood. After his first win, to which he promised reward himself with a tattoo, he finds out his favourite tattoo artist is a biker.

Park Haeun didn't trust easily, in fact she only trusted a few. Her twin, Jimin, and her older brothers Jinyoung and Chanyeol. Her father had lost her trust years ago and Haeun simply didn't have friends. Perhaps she trusted her gangmates some, but definitely not with her life. In her world of bloodlust and lies, the only people she had trusted was her family, her brothers. Some said that there were things stronger than blood, but she had never believed them. Haeun had always thought that her

Wonwoo is a star that burns in cold fire, observative glances and exceptional performance.  Mingyu is a star that burns like an inferno, hardened fist and brilliant mind. When these two stars clash and spiral down, the sight that will graze the heavens will be spectacular.