After twenty years of marriage, Olivia finally walks away from her cheating husband—on the very day he wins the lottery. Hoping to help his mother save face, her son secretly finds her a "temporary husband" online. But the man she impulsively marries turns out to be Atticus Cavendish—the powerful billionaire CEO her ex-husband works for! What starts as a fake marriage soon becomes something far more complicated... But neither of them realizes their lives were already bound by fate… twenty years ago, on a night that changed everything.