ChaeMi is a adopted child of a wealthy family.  Her real parents were gone.  Now in this new family, she has an older brother, Kris.  This wealthy family owns Korea's largest company.  But behind this extravagant fact, there's an ugly truth:

They are criminals.

The reason why ChaeMi is still adopted although she knew the truth beforehand, is because her parents were criminals too.

The tradition will go on, the two of them are raised as criminals too, with their crew.

And also, ChaeMi's forgotten past will aroused, as well as her forgotten friends.