Eddie Ellison is an ex-con who spent time in Sing-Sing prison. Kay marries him as soon as he serves his time. Five years later, Eddie and his ex-convict buddy Larry, have both gone straight, and Eddie and Kay have a beautiful little girl named Shirley. However, Welch has kept a close eye on them for years. He believes in "once a criminal, always a criminal."
Then, when Eddie's employer's wife's pearls go missing, it comes out that Eddie and Larry both spent time in prison, and they're fired. Welch suspects that Eddie and Larry have something to do with the theft of the pearls. Will Welch prove that Eddie and Larry had something to do with the theft, or will the truth prevail?