Iris, whose family has fallen on hard times, is forced to marry global financial tycoon Lucas in place of her older sister to pay off her family’s debts, signing a one-year contract marriage. She just wants to keep a low profile, collect her money, and leave when the term is up; he sees her as nothing more than a business arrangement. But after they marry, Lucas—who is so cold that he trusts no one—repeatedly makes exceptions for her, covers for her, grows jealous, and loses control. Finally, he tears up the contract and humbly begs her to turn their one-year marriage into a lifetime of true love.
