When Ji-young's family is threatened by a loan shark on Christmas Eve, she makes a desperate deal with the devil: a cold contract for a fake engagement to the city's most ruthless CEO, Lee Han-joon.
He needs a fianc e to close a deal and redeem his family's honor; she needs to save her parents. It's a perfect, emotionless arrangement... until their pretend love story begins to feel dangerously real. As they navigate a world of high-stakes deception, they uncover a dark secret from the past that threatens to unravel everything. Can a relationship built on a lie survive the brutal truth, or will their holiday miracle be a Christmas tragedy?