For twenty years, Elena has been invisible in the Castellano mansion—the perfect maid who knows her place, harbors her secrets, and nurses a hopeless love for the man she serves. But when Marco's mother arranges his marriage to a suitable heiress, Elena's carefully constructed world begins to crumble. Desperate to save his company and bound by family duty, Marco makes an unexpected proposal that changes everything: he'll marry Elena instead, but only as a business arrangement. What begins as a transaction soon ignites into something neither of them bargained for, threatening to expose the feelings Elena has hidden for years and the walls Marco has built around his guarded heart. In a world where love and money collide, can two people from different worlds find something real—or will the truth behind their arrangement destroy them both?