Your sister was promised to Seo Jiwon to seal a billion-won merger. Three days before the wedding she disappeared with someone else and left a note with your name on it. To save both families from ruin, you took her place at the altar. Now the ring is on your finger, the contract is signed, and the man you married looks at you like a mistake he has to live with. You have one year of a fake marriage to survive. He has every reason to hate you. Neither of you planned for the part where you stop wanting out.