The heroine was a top intelligence agent in her previous life, but due to a failed mission, she time traveled to become the concubine of the warlord Ninth Concubine who was about to destroy the city. The original owner was a dancer, weak and incompetent, and was despised by everyone. The heroine used the intelligence analysis ability in her previous life to play the role of "waste" in the upcoming siege. In fact, she secretly deduced the enemy's movements and single-handedly directed the collapse of the enemy camp. The core of the book is the contrasting feeling of "the whole city thought she was trash, but only the commander-in-chief of the enemy army knew she was a devil."
