Now that her moonshine shop is open, Hattie Hayes can focus on expanding to events, like the Chattanooga Choo Choo Model Train Convention, which is full steam ahead at the convention center. Hattie is all aboard, using this opportunity to promote her Southern homebrew. When an attendee dies after drinking some of it, she'll need to prove her innocence. Between tight-lipped train hobbyists and competitors for a coveted convention prize, Hattie has an array of suspects, and she ll need to use her wits to make sure her moonshine business can stay on track.