From publisher blurb:
Murder at Sable Mansion is a short murder mystery adventure for four to five 3rd-level characters and includes scaling suggestions for weaker or stronger parties.
There’s been a murder at Sable Mansion! The characters are invited to dinner at the established mansion at the behest of Mr. Sable, a well-known figure of high repute and deep pockets. Alas, when they arrive, their host is already dead, and the other guests are each determined to pin the blame on the newcomers, or each other. An evil doppelganger, the cause of the disaster, plagues the house throughout the evening.
Mr. Sable was an eccentric elderly gentleman who lived alone at his large mansion, accompanied only by his familiar “Erskine” and a few select house staff who have dwindled with the passing of years. He’s known to have amassed a large fortune, and has a habit of making extravagant financial gifts to his dinner guests out of whimsy—to be invited to one of his dinners means you have caught his eye in some fashion. Alas, Mr. Sable was killed by a doppelganger just prior to his latest dinner. The doppelganger intends to have some deadly fun at the expense of the guests.