While watching from her train window, Nikki Collins witnesses a murder in a nearby building. When she alerts the police, they think she has read one too many mystery novels. She then enlists a popular mystery writer to help her solve the crime on her own, but her sleuthing attracts the attentions of suitors and killers.

During the Austrian-Prussian war, Anna Marie is a dancer who is forced to flee her country after she is accused of being a spy. She ends up in a lawless western town in Arizona, where she uses her charms and dancing skills to transform herself into "Salome" during her dance routines.

A Broadway producer's Girl Friday must make sure that her recent marriage is kept secret. If it gets out, she will lose her job. Unfortunately, her new hubby is tired of hiding the truth and creates all kinds of problems when he decides to spill the beans.

Working undercover, Allen and sidekick Mendoza are out to stop the mail train robberies. Rivers and his gang are the culprits and by joining up with them, they hope to get the evidence they need.