Sherlock Holmes is approached by an insurance company representative when two members of a very exclusive club die in mysterious circumstances. In a manor house in a remote part of Scotland, the only 7 members of the Good Comrades club meet for dinner but during the meal, Ralph King receives an envelope addressed to him and he died the following night. Soon after, a second message is received for Stanley Rayburn, a once distinguished actor and he too soon died in mysterious circumstances. The envelopes they receive contain only orange pips, one for each remaining member of the club. They all suspect one another and as the murders continue, the number of suspects is reduced. For Sherlock Holmes however, the case is not so simple and he looks to another solution to the crime.