It's a week before Christmas, but Milwaukee bar owner Mackenzie "Mack" Dalton is hardly in good spirits. Chilled to the core by the murder of bouncer Gary Gunderson, Mack is determined to use her extra perceptive senses to identify the gunman responsible. Did Gary's patchy past brew up some fatal trouble, or could his death be linked to a series of cryptic letters concocted by Mack's anonymous adversary? With a second case to crack, innocent lives at stake, and a media frenzy in their midst, Mack and her barstool detectives have little time to mull over the grim details—especially when clues lead dangerously close to home . . .