1932. After being left at the altar, free-spirited Ginny Weltermint boards a train and heads back home to Hollywood.

But when she stumbles across a body in one of the carriages, she unwittingly becomes involved in a murder mystery. Stopping in a small village to investigate the crime, Ginny soon clashes with the surly, old-school detective who comes aboard to solve the murder.

With the clock ticking, it's clear that there will soon be another victim. But can the two put aside their differences and join forces to find the perpetrator and solve the mystery?