Grover Allen who has worked at the clock factory for forty years is once again a few minutes late for work. When his boss George Duskin catches Grover daydreaming again, he has had enough and fires Grover who is dumbfounded. Concerned not only about himself but the other workers who Duskin is threatening to fire, Grover, a tinkerer and inventor, decides to build a bomb which kills Duskin. Grover takes his widowed daughter-in-law Della who was married to his son who died at Gettysburg and his grandson Jeff on the Hale wagon train to settle in the west and escape the law. He is happy to be free but Jeff is far from happy wishing to be back home. Things become complicated when a drummer, Will Stebbins, joins the wagon train handing out two week old newspaper to people on the train that says detectives are searching for the bomb maker who killed Duskin. Will, who is really a detective, quickly narrows in on Grover but he is also becoming increasingly fond of Jeff and especially Della.