Seol Gongchan is the wealthy, unattached heir to a large company. Having lost both his parents, he is devoted to what remains of his family, particularly his ailing grandfather. After deciding to cut off his only daughter after disapproving of her marriage, the old man is plagued with guilt since the couple was killed soon after he lost touch. By chance, Gongchan meets a woman who resembles his lost aunt and is inspired to use her to fulfill his grandfather's last wish. The woman, Joo Yoorin is the daughter of a compulsive gambler and is constantly on the run, so when Gongchan offers her this opportunity, she cannot afford to refuse. After Yoorin moves in with the family, Gongchan finds himself drawn to her and a forbidden attraction springs up between them.