Lin Wei, a modern forensic doctor, was hit by a mysterious electric current on the autopsy table and traveled through time to become Shen Lanxi, a concubine in the Marquis of Jing'an who was poisoned and mute. She will be falsely accused of "killing her brother to death" and giving him poisoned wine within three days. The original obsession was to protect the three-month-old fetus in her belly, and the anchor point connecting her to the modern world was the bronze key given to her by her mother before she died, which corresponds to the manuscript of the "Poison Sutra" in the secret room of the ancestral temple in the Hou Mansion.
