Scarlett Spades, a seemingly ordinary housewife, is secretly the last heir of the murdered Gambling King, forced into hiding since her family was wiped out. When her devoted husband is framed by a rigged casino and driven to the edge, Scarlett is dragged back into the underworld she swore to abandon. Playing the naïve "lucky girl", she seduces cheaters into arrogance and destroys them with impossible wins—until her revenge awakens the true mastermind behind her parents' deaths, and one final bet demands blood, love, even her life...