On Eun-hye and Joo-won's 5th wedding anniversary, what should have been the happiest night of their lives turns into an absolute nightmare when Eun-hye's stepsister, Min-jung, crashes the party. "He's mine now. Give him back." Driven to the edge by Min-jung's psychotic rampage, Eun-hye collapses on the cold floor, losing her precious unborn baby. Yet, Joo-won coldly turns his back on his bleeding wife, carrying Min-jung away in his arms. Watching them leave, Eun-hye finally decides to end the toxic marriage she had been holding onto all alone. Only after Eun-hye vanishes without a trace does Joo-won begin to face the horrifying truths she left behind—the true face of the Min-jung he trusted, and the living hell Eun-hye endured in silence. Can Joo-won ever turn back the clock and save this shattered love?