Ms. Sullivan arrives with leg numbness and learns she may be poisoned with bone toxin. A doctor warns the poison is highly corrosive, hard to detect, and leads to paralysis after a long incubation; he insists on no outside food and offers treatment with his herbs and tea. Mr. Lee of the Lee family examines her, confirms bone toxin after tests, and says a cure needs several extremely rare ingredients. He can only delay paralysis with medicine. With chances slim, they arrange contact with the Lee clan, leaving her fate uncertain.