Lee Ji-yoon is a loving daughter who would do anything for her family. Because of this, she enters the world of gambling, a world where you only have two chances-either you win or you lose. Here she meets Park Chanyeol, a young man with natural born talents in gambling. No one dares to challenge Chanyeol when it comes to gambling. But then, Ji-yoon challenges Chanyeol and makes a bet. Ji-yoon bets to be his maid if she loses and Chanyeol bets his entire fortune. Will there be a possiblity of them falling in love for each other?