Modern emergency physician Wendeline Lin travels back in time to the Great Xia Dynasty, where she becomes a lowly imperial physician maid in the Eastern Palace. She originally planned to serve for three months, collect her payment, and stay far away from the imperial court's power struggles, but is assigned to care for Crown Prince Jasper Shaw, who suffers from a chronic illness and is trapped in a political predicament. The imperial princes are locked in fierce succession battles, with endless conspiracies and schemes unfolding one after another. Relying on her superb medical skills and extraordinary wit, Wendeline repeatedly escapes danger, and becomes deeply entangled in the crown prince succession dispute. The two go from mutual suspicion to trusting each other with their lives, working together to break through countless conspiracies, protect the country and people in the treacherous imperial court, and build a new future together.