Rex receives a copy of an invitation a local politico says has been sent to several people, inviting them to his murder at a party at his home at a given time. The politico wants Rex to find out who sent them and theoretically thwart his murder. The party happens before Rex is able to track down the source of the invitation, and there is a murder, but not the politico's. Someone has taken advantage of the murder invitations to kill someone else at the party.
Cal Calhoun finally finds the printer who made the invitations and the surprising person who ordered them, leading Rex to the correct murderer in the end.
Cal Calhoun finally finds the printer who made the invitations and the surprising person who ordered them, leading Rex to the correct murderer in the end.