A Death in Space

From publisher blurb:

This is an adventure for Cepheus Engine.

While traveling aboard a luxury liner the travelers are summoned by the captain. A passenger has been murdered in his state room. The passengers aboard the craft are rich, famous or noble. The captain is not prepared to ask questions or make accusations against such people. He needs someone, who is not associated with the cruise line, to do the investigation before the ship reaches port. He makes a generous offer to the travelers to handle the issue delicately.

This is a mystery story for the travelers to solve.