"Marry me." A two-billion-dollar commission offered to a mercenary in a private military enterprise. The conditions are: a year-long marriage. "Mrs. Lee, are you the only one who can take pictures of your divorce history?" Lee Hae-hwa, the only child of Daesan Construction. To complete the painting out of her stepfather's control, Rae-hwa hires a legal guardian who will protect her for a year. But Kwon I-tae, who he hired as his only hope, was an unpredictable maniac. Marriage and cohabitation, which began with a contractual relationship, are going in an increasingly strange direction…