Horror's Heart: Tales of Terror (1920)
This dangerous investigation is set in Canada¸ in the 1920s.
The investigators meet the powerful Lavoie family of Montreal and learn what imperils them. They glimpse a strange cult that now thrives in Quebec and the ancient nemesis that guides it. They come to understand the horrible significance of a corpse discovered in the foundations of a former seminary. They at last perceive the true motives of Father Philip McBride¸ and they gather at last the full truth about a Churchly saint who has long fascinated McBride. There are plenty of puzzles to solve here and investigations to be carried out until the final day of play¸ an unusually complete blend of action¸ deduction¸ and interesting predicaments. Player-characters have time to get their bearings¸ making this adventure a good one for beginners¸ but even old hands are soon challenged by a succession of deadly perils.
Horrors Heart is designed to be finished over several evenings. It includes about twenty handouts¸ many illustrations¸ several new spells and magical traps¸ source material for Chaugnar Faugn¸ and lots of murders and murderers....
Experience it with 7th Edition Call of Cthulhu.