The newly appointed county captain Wei Tao in Chang'an encountered a series of poisoning cases as soon as he took office, with several elderly people from the "Beitian Orphanage" dying under mysterious circumstances. He refused to follow the county subprefect's absurd theories and traced the case to the female doctor Jiao Yu's Ganlin Clinic. The investigation was full of dangers, but Wei Tao broke through the obstacles and finally uncovered the truth.
