To cover her father's crippling ICU bills, ordinary girl Elowen is forced to step into the shoes of her twin sister—who fled her own wedding—and marry Lucian, the cold and ruthless billionaire tycoon.Over one year of a "stand-in marriage," her quiet sincerity slowly melts the icy CEO's heart. But when her vain sister makes a high-profile return, determined to reclaim the throne as "Mrs. CEO"—and even threatens to pull the plug on Elowen's father's ventilator—Elowen walks away in despair.