Three years after their marriage, Shen Yuan found a bottle of the highly poisonous "Wangchuan" and a secret message in a secret compartment in her husband Lu Heng's study. She was so heartbroken that she drank poison and faked her death, then infiltrated the world under a pseudonym. However, it was discovered that Lu Heng had a hidden agenda for hiding the poison - he was plotting to take revenge on Zhao Wujiu, his enemy who destroyed the family in the past, and the poison was actually a plan instigated by Xie Yunzhou, the left guardian. Shen Yuan, who came back from the dead, with the help of Liu Rushi, a master of medical poisoning, gradually uncovered the intricate power struggle behind the scenes, and also went from misunderstanding to side by side with Lu Heng.
