It’s one suspicious death after another at Drearcliff House in remotest Scotland, where an odd fraternal organization, the “Good Comrades,” gathers yearly to do some comrading. Holmes and Watson arrive at the behest of an insurance agent who suspects someone is trying to collect on a huge life insurance policy on the seven men. The duo think it best to take up temporary residence at Drearcliff in hopes the killer will reveal himself. Despite the warm hospitality of the vivacious housekeeper Mrs. Monteith, three more suspicious deaths occur right under their noses.