Lt. William Seacroft, on leave from the Italian front, arrives at the New York home of Ruth Wilkins, with whom he has been corresponding. Unknown to both Ruth and Bill, Ruth's younger sister, Miriam, has been writing the letters and signing Ruth's name as part of a program to keep up soldiers' morale. Although Ruth has just gotten engaged to a coworker, she agrees to see Bill and pretend she wrote the letters.

In this sequel to Dear Ruth, teenaged Miriam starts a political campaign to nominate Bill Seacroft, her brother-in-law, for state senator in opposition to the local political machine. Unknown to Miriam, said machine nominates her father, Judge Wilkins. As support grows for Bill, the presence of rival candidates under one roof poses problems, especially for Ruth, wife to Bill and daughter of the judge.

Mirian Wilkins, the teenage daughter of Senator Wilkins, starts a Society for the Rehabilitation of Criminals and, without the approval or knowledge of her father, elects him to the position of honorary president. When the family's new gardener, Baxter, turns out to be a notorious ex-convict who was sentenced to prison by Senator Wilkins when he was a judge, Wilkins considers firing him until his daughter points out that would be an unwise decision considering the position her father held on society.