There are a man and a woman who have led lonely life respectively and have come together in order to achieve one goal; to get the huge amount of inheritance from an old loan shark. They make a contract between them and are determined to do whatever it cost in order to succeed, but as time passes, they find themselves deeply in love with each other. Still, they keep on working as they planned, but their pursuit of success becomes more painful rather than excitement. Based on a French bestselling novel LA FEMME DE PAILLE by Catherine Arley, this drama follows two lost souls searching for true meaning of life. Are they going to find happiness in the end, or will it be regret?