Ms. Sullivan arrives for evaluation after unexplained leg numbness; healer Mr. Lee examines her and orders tests. Lee confirms a corrosive bone toxin with long incubation that will cause paralysis; he says it’s hard to detect and not fully curable. He prescribes herbs and medicines that can only delay symptoms for a few years and warns the true cure requires several extremely rare ingredients. Ethan, who earlier recognized the poisoning, is vindicated. The episode ends with tests pending and the slim chance of finding those rare ingredients leaving the chairwoman’s fate uncertain.