By day, Mackenzie 'Mack' Dalton is the proprietress of a popular Milwaukee watering hole. But after last call, she uses her unique cocktail of extra perceptive senses to help solve some of the city's most grisly homicides. Now, Mack and her barstool detectives are happy to help when Tiny, one of the bar's newest patrons, asks them to look into his sister's murder. Though the case has gone cold, Mack's heightened senses quickly put her on the killer's trail. But when a throng of reporters intrigued by her talents descends on Mack's Bar, her efforts are muddled as a real-life Moriarty begins putting her infamous skills to the test, leaving Mack feeling shaken and stirred . . .