A new drug has appeared on the streets of Kansas City the capital of the Republic of the Plains. Its tendrils reach out and suck in the players, willingly or not. Throwing them into the middle of a desperate search to find the distributor. The answer however will shock and haunt them possibly for the rest of their lives.

Somnium Mundus is the first adventure in an investigative adventure arc set in the Twilight Sector, Traveller Compatible campaign setting.