The Five Orange Pips

A man receives five orange seeds, or pips in a letter, but they have been tainted with some kind of serum that induces a coma in him. Before succumbing, he writes down an address and gives his son these instructions. Get help from Sherlock Holmes, and under no circumstances is he to be brought to a hospital. Complicating matters, is the family are ""anti-techs,"" people who are strongly against tecnology and robots of any kind, preferring to live in Sherlock's time period. Watson is not exactly welcome...