Molly and Bee, sweet young 'working girls,' live in a cheap room over a New York grocery store. Molly's idol, wealthy Jack Cromwell, lives in a Long Island mansion but is markedly less happy, since his fiancée Jane won't discourage her other admirers. Fleeing in his car, Jack ends up in an urban block party where he meets you-know-who.

In 19th century France, Jean Valjean, a man imprisoned for stealing bread, must flee a relentless policeman named Javert. The pursuit consumes both men's lives, and soon Valjean finds himself in the midst of the student revolutions in France.

Two sisters from Indiana, the wide-eyed and innocent Mae Thorpe, and her more streetwise sister June, move into the Rolf House for Homeless Girls in New York. With June's help, Mae obtains a job as a stenographer for the scientist Joseph von Schraeder, while June gets work as a telegraph operator at Western Union.

Although his murdered friend was by all accounts a scoundrel, Edward Wales is determined to trap his killer by staging a seance using a famous medium. Many of the 13 seance participants had a reason and a means to kill, and one of them uses the cover of darkness to kill again. When someone close to the medium is suspected she turns detective, in the hope of uncovering the true murderer.

Holmes and Watson board a passenger train bound from London to Edinburgh, to guard the Star of Rhodesia, an enormous diamond worth a fortune belonging to an elderly woman of wealth; but within the first hour of the trip, the woman's son is murdered and the diamond stolen and any of the passengers in their car could be the killer thief.