Kitty Vane, Alan Trent, and Gerald Shannon have been inseparable friends since childhood. Kitty has always known she would marry one of them, but has waited until the beginning of World War I before finally choosing Alan. Gerald graciously gives them his blessing. Then, Gerald and Alan go to war. Angered over a misunderstanding involving Alan and Kitty, Gerald sends Alan on a dangerous mission that will change all their lives forever.

"The Terror", a killer whose identity is unknown, occupies an English country house that has been converted into an inn.

Guests at a women's residence club help a jilted small-town girl turn to modelling.

As a luxurious ocean liner makes its way across the Atlantic Ocean, the audience is made privy to the travails of several of its passengers. Edmund Lowe heads the cast as Monty Greer, a suave gambler who falls in love with Judy, the daughter of immigrant lens grinder Rudolph Kramer. In trying to recover some valuable securities stolen from banker Henry Graham, Greer finds himself in the middle of a fierce gun battle in the ship's engine room. Meanwhile, Graham, who has been cheating on his wife Kay with sexy dancer Sigrid Carline, is murdered by person or persons unknown.

A mob boss has a change of heart when his daughter convinces him to move on from crime.

Madeleine steals a string of pearls in Paris and uses American engineer Tom, who is driving on his vacation to Spain, to get the pearls out of France. But getting the pearls back from him proves to be difficult without falling in love.

A woman and a man vying for a woman's affection: the usual love trio? Not quite so since the belle in question is Lorraine de Grissac, a very wealthy and alluring society woman, while one of the two rivals is none other than Arsène Lupin, the notorious jewel thief everybody thought dead, now living under the assumed name of René Farrand. As for the other suitor he is an American, a former F.B.I. sleuth turned private eye by the name of Steve Emerson. Steve not only suspects Farrand of being Lupin but when someone attempts to steal a precious emerald necklace from Lorraine's uncle, Count de Brissac, he is persuaded Lupin is the culprit. Is Emerson right or wrong? Which of the two men will win over Lorraine's heart?

When his mother dies, young Peter Ibbetson leaves Paris and his best friend, Mary, behind to live with a severe uncle in England. Years later, Peter is an architect with little time for women, until he begins a project with the Duke and Duchess of Towers. When Peter and the duchess become great friends, she reveals that she is Mary — but the duke soon suspects his wife of infidelity and challenges Peter to a duel, threatening the pair's second chance.

Wealthy Jack bets friend Michael he can woo Lu Lu without money within 2 weeks. Michael hires inept detectives to stop Jack, leading to comedic misadventures as Jack pursues Lu Lu while hiding his penniless state.