In 1930s Gyeongseong under Japanese rule, Kyung-hwa, who lost her parents at the hands of an independence activist, was forced to grow up as a man under her pro-Japanese grandfather. Yeo-hee, who has lived her whole life as a descendant of patriots and independence activists, finds her life intertwined with Kyung-hwa's when her grandfather is wrongfully accused and captured by the Japanese police. "Get out right now." "Where exactly am I supposed to go?" "......" "Today was supposed to be the wedding, have you already forgotten?" Yeo-hee, who marries Kyung-hwa as a price for saving her grandfather, begins an uncomfortable cohabitation with him. Despite living under the same roof, the two, who had been avoiding each other awkwardly, start to clash more and more as time goes on... "Why are you helping me?" "I'm not helping you. I'm using you." Kyung grits his teeth, gripping the back of the sofa tightly. His pale face, devoid of laughter, hardens coldly like a demon. "Please do not hold any debts in your heart. You might want to blame me in the distant future, you know?" "You don't have to worry about that." The gaze that looks up at Kyung, who speaks without hesitation, is sharp, but in an instant, it changes as if putting on a mask. "Rather, you might end up blaming me."