ian Sun is the new exchange student of Seoul International Academy. On top of having to live with her host family, who happens to be the CEO of Kim Corp., she finds out that this position has more to it than she thought. Not only is she now caught up taking care of one Kim son, but she soon finds herself having to watch out for the eldest son of the Kim family, Suho. Not because of his cocky, charming personality, but for the fact that Suho has more to his "son of a tycoon" status then meets the eye.

On top of discovering his world, she finds out that her mystery man, Kris, and all the other friends she has been making along the way is caught up as well; it was fated from the start that she would end up in this world of racing and gangs. Especially now that her life is in danger, discovering that a notorious gang called The Unknown is out for her.

Now Rian is having to learn not only how to live life in the fast lane, but choose between the two who got her there in the first place.