An Unfortunate Discovery

From publisher blurb: Edokka IV is a nearly deserted world owned and exploited by the Ilsunsi Directorate. The planet has abundant mineral resources which are necessary for the Ilsunsi production lines on other worlds. The Directorate uses off world miners to extract the ores. Recently, however, the miners have discovered something in the mines. Some of the miners have begun dying from unknown causes. Other miners are refusing to go down into the mines. The Ilsunsi are willing to pay for someone to go down into the mines to find the cause of the problems and correct it. This is a Cepheus Engine Adventure.