Natalie saved the life of the wounded billionaire Dominic in the countryside, performing a life-saving surgery before vanishing unseen. Later, an ancient family pact forces them into a 100-day marriage. Dominic is obsessed with finding his 'hidden savior,' never realizing she is the very wife he treats with indifference. As their marriage progresses, Dominic grows increasingly suspicious as Natalie’s 'myriad faces' emerge: he discovers she is a world-renowned surgeon, a brilliant professor, and a powerful CEO. Every revelation leaves him stunned. Will Dominic realize he already found his savior before their 100 days run out? A sweet story of hidden identities and fated hearts.