Yvonne Sterling, a modern catering executive, transmigrates to the Great Zhao Dynasty, is framed and becomes a deposed empress trapped in the Cold Palace. Relying on her culinary skills and business acumen, she activates the Midnight Canteen System, expanding her late-night snack business across the imperial palace. She thwarts palace conspiracies and quells political upheaval. She builds a deep palace food empire, growing close with the emperor.
