sentences:  The Qianlong Emperor is not the legitimate successor to the throne since at birth he was exchanged with the Yongzheng Emperor's newborn daughter.He learns the truth when two senior members of the Red Flower Society, a subversive anti-government secret organisation, contact him years later, hoping that the emperor will help them in driving the Manchus away.To hide the truth about his heritage, the emperor orders the two men to be killed, although one of them escapes and is captured again later.