The Genius Wife of Poisons: The Legend of Yunxi. Book 3

Han Yunxi is accused of poisoning and murdering the princess. To save her, the great prince Qin takes an unprecedented step and jeopardizes his own future. Now Yunxi must prove her innocence, uncover the mystery of the poisoning, and find the real criminal. The further she progresses in the investigation, the clearer it becomes that behind the accusation lie lies, fear, and a struggle for power at court.