The Mystery of Loch Feinn
Author(s): Glenn Rahmann
Artist(s): Chris Marrinan
Appears in: Cthulhu Companion
The rumored existence of a surviving Plesiosaurus has drawn famed professor Willard Gibbson to Scotland. But before he can gain conclusive proof, he is found murdered. Will the investigators succeed in solving both the murder and the puzzle of the beast?
Spoilers - Keepers Eyes Only
Players should not read any further.
The party are drawn in following the murder of Professor Gibbson, either as old friends, to investigate the murder, or to follow up on the Professor's research. They may be recruited by his daughter or by the British museum.
The Professor has found a number of interesting megaliths, and been observing the Loch. However, the powerful MacAllan clan were obstructing his work and threatening him. He became concerned by some of what he learned, particularly cryptic hints dropped by a drunken MacAllan, and concealed his journal shortly before his murder. The MacAllans have a history of strange dabbling, and the town has many legends of a Water Horse, which has been blamed for many missing animals and people.
The MacAllan clan are, in fact, cultists of a lloigor colony under the ruins of an old castle. They are helping the lloigor to extend their psychic influence by restoring the standing stones.
Player Handouts: List the player handouts here.
Locations: Loch Feinn (near Inverness in Scotland)
Creatures: Lloigor, MacAllen cultists
Tomes and Artifacts: Unaussprechlichen Kulten (useful, not present)
List dedication, trivia, images, anything else of note.
There are no stats for many of the NPC enemies.
There is a very nasty 'trap' in the ruined castle, in the form of a mirror that summons an image of Ghatanothoa. There's no warning in the scenario, or any way for Investigators to work out what it does, and they might naturally assume it's relevant to the plot and try to use it. In fact, it's not plot-relevant at all. Keepers may want to reconsider this element, since it's extremely powerful, and could distract Investigators away from the actual plot.
Investigation could usefully be more fleshed-out. The information available to Investigators is somewhat vague: they should easily realise that there's something to do with 'dragons' and that the megaliths are involved, but learning what the MacAllans are up isn't easy. Their rituals are very occasional, and they're very quick to murder nosy people. Investigating the ruins is likely to attract a lloigor, with its instant-kill attack; the scenario emphasises that the victim probably doesn't realise their danger until it's too late. As written, the scenario seems to rely on Investigators simply deciding to destroy the stones, rather than trying to learn what's actually going on. If not, violence will quickly escalate.