To cover her father's hospital bills, Jiwan agrees to become Taeseong's legal wife for three years; a marriage of convenience with one condition, one billion won once the contract ends. Bound by strict terms, the contract prohibits any contact throughout their marriage. Three years pass, and two weeks before the contract expires—Taeseong suddenly shows up at her door convinced that Jiwan is the love of his life. Now, with her payout on the line and Taeseong clinging to a love that never existed, will Jiwan still be able to walk away with the life she planned?