Prince Augustus has been imprisoned by the Empress for a decade, feigning madness to survive. Amnesiac maid Eloise is sent to serve him in the West Rose Chamber, and they fall for each other. She is the sole surviving witness to the king’s murder, whose memory was erased by the Empress’s drug. When Eloise is exiled, Augustus breaks free to rescue her. They gather solid evidence and expose the Empress’s regicide plot in court. The villain is convicted. Augustus ascends the throne and bans memory-erasing drugs, while Eloise chooses to stay with him, finding true love and freedom.