The wife of one of the bar's patrons is murdered while showing an upscale home to a prospective buyer. Why was she killed? She had no enemies. No jealous lovers. The police can't identify anyone who would want to harm her or benefits from her death. Their only clue is the unusual calling card the killer left behind. The police are baffled and the case is at a standstill when a group of the bar's regulars form the Happy Hour Posse to help bring closure to their grieving friend. When two more similar murders are reported in nearby states the FBI Serial Killer Task Force steps in, takes charge, and makes no progress. Belly up to the bar and enjoy how this motley group of barflies outthinks and out-detects the FBI and solves these baffling murders.