Centered on a contract marriage, the drama follows the fateful entanglement between Evelyn and Declan, filled with suspense and twists. In an underground casino, Evelyn, gifted with extraordinary hearing, exposes fraud under the alias Echo. Meanwhile, Declan is pressured by his family to marry or risk losing his position as chairman. Middleman Noah offers Evelyn a one-year contract marriage with a huge reward as temptation. Cornered by circumstance, Evelyn and Declan—who only seeks a nominal wife—meet at a law firm. Though mutually repelled, they compromise for reality and settle the contract terms. Yet a mysterious whisper on their wedding day hints at hidden conspiracies and dangers behind their marriage deal.
