After six years abroad, Zacarías Montiel builds the world's largest financial empire—the Centurion Group—under the alias "Mr. Z," even helping the current president rise to power. When he quietly returns home to propose to his girlfriend, Isabela, she leaves him to pursue wealth, claiming that only the mysterious Mr. Z is good enough for her. Meanwhile, a small favor leads Zacarías into a sudden marriage with Fernanda Salazar, the beautiful CEO of Prisma Media. At Isabela's housewarming party, she repeatedly tries to kick Zacarías out—unaware of his true identity—until he finally decides to reclaim everything he once gave her.