It's August in Chattanooga, Tennessee and moonshiner Hattie Hayes has collaborated with a nearby vineyard to serve her moonshine at a Wine and 'Shine event. Not only is this an opportunity for Hattie to gain more moonshine fans, but she's also excited to hear the Bootlegging Brothers, a popular bluegrass band. But not every attendee is looking for harmony. When one of the brothers disappears and is presumed dead, Hattie realizes her grace note gathering has suddenly turned more sour than her mash.

Unearthing what happened to the missing musician is more difficult than Hattie first expected. Hattie's moonshine is tied to the crime and there's no time to fiddle around--she has to step up to solve the case. Luckily, Hattie's cool head and quick mind help her understand that when investigating a musical crime, always stay sharp.