Lee Hana has spent two years as the invisible assistant to cold, ruthless CEO Kim Min-jun—silent, efficient, and unshakable. She's even lied to him about hating Christmas, just to keep a careful distance from the man who never smiles. But when Min-jun refuses to attend the company Christmas gala, he sends her in his place, ordering her to be his voice, his image, his presence in a room full of Seoul's most powerful players. Dressed in a gown he personally chose, Hana steps into the glittering world of high society—and straight into the path of Jeon Seok-ho, a man Min-jun warns is dangerous. But Min-jun's unexpected appearance at the gala reveals something darker: a corporate vendetta rooted in family betrayal, and a forbidden attraction he can no longer mask. In a night of shifting alliances and unspoken truths, Hana finds herself caught between protecting her heart and uncovering the real reason Min-jun wants her by his side this Christmas.