Undercover agent Robert Leyland entraps crooks trying to sneak expensive goods past customs on transatlantic crossings. After Leyland falls for reluctant smuggler Barbara Standish, he convinces her to return with him to France with her cache of diamonds. But she is unaware of a network of thieves onboard their ship, competing against each other to make off with her jewels.

Garage owner Harry Stone buys a racehorse, Brownie, from Peggy Lanstone and, according to formula, hires Peggy as the steed's trainer. When the filly finishes a mere second in the Oaks, Harry's snooty fiancee, Muriel, who never liked the setup anyway, disgustedly heads for greener pastures. Harry promptly marries Peggy, and, after an official investigation of the Oaks' results, Brownie gets revenge on the fickle Muriel.

Old Mother Riley is a British comedy film directed by Oswald Mitchell and starring Arthur Lucan, Kitty McShane, Barbara Everest, Patrick Ludlow and Hubert Leslie. Mother Riley and her daughter stop the plans of some disinherited relatives to overturn the terms of a will. It was the first in the Old Mother Riley series of films.

A brass band goes to London to take part in a competition.

Alan Burmister leaves Devon on a secret gun-running expedition immediately after his engagement to Mary Perrin is announced; he returns at Christmas to find himself accused of the murder of Ivor Connel, a moneylender. Mary's father had always hoped that his daughter would marry John Worrall, a rising barrister. Worrall is briefed for the defence, but when he loses the case and Alan is condemned to penal servitude for life, no one but the judge realises that he has not made use of the best piece of defence evidence...

Two cousins invite their girlfriends on a joy-ride, but car trouble leads to catastrophe!

Darby is a blind girl and Joan is her elder sister. The story revolves around Joan's passion for Yorke - an idle scamp - and her marriage to his uncle, the family benefactor.

In an attempt to save her late father's music hall, Jean Parker stages a nationwide hunt for talent.