Lee Jin-woo is the king of control. The youngest CEO in Seoul, he's built an empire on precision and perfection. His next move? A fake marriage to a quirky, part-time decorator to close a massive merger. It's a simple, foolproof plan—until his family demands a lavish Christmas vow renewal ceremony. Now, his carefully constructed lie is a public spectacle, and his fake fiancée, Park Seo-yeon, is a walking, talking risk to his carefully guarded heart.

As they navigate a treacherous world of family secrets and corporate sabotage, they discover that their perfect contract might just be the most dangerous, and most real, thing they've ever done.