The regulars at Mack's Bar love putting their heads together to solve a good mystery. But Mack is learning there's a big difference between barroom brain teasers and real-life murder. . .

Milwaukee bar owner Mackenzie "Mack" Dalton has a unique neurological condition that gives her extra perceptive senses, and police detective Duncan Albright is convinced Mack's abilities can be used to help catch crooks. Mack may be a pro at mixing drinks, but she's still an amateur when it comes to solving crimes--and she's not sure she should mix business with pleasure by working with a man who stirs up such strong feelings in her. At her first crime scene--a suspicious suicide--she experiences a heady cocktail of mixed sensations and emotions that make her question whether police work is right for her. But when Duncan asks her to help find a kidnapped child, she knows she has to give it a shot. . .