Brash young Sgt. Gray makes a bet that he can have breakfast with his commanding general. But a couple of enemy spies, intent on infiltrating the training camp, get in the way of Sgt. Gray's plans.

Jim Young of Youngstown, Pennsylvania, reads of the German war atrocities and decides to enlist in the British army, thus becoming a forerunner of the American forces that are subsequently to leave for the battlefields of Europe. He begins active training at a camp outside London. While enjoying a few hours of leave, he meets Susie Broadplains , a young woman from Australia. She is flattered by his attentions and their friendship soon blossoms into love. However German plotters plan to destroy an arsenal at night and Sir Roger is inveigled into driving an automobile along a London road with its lights turned skyward to guide the Zeppelins. Jim, wounded and home on furlough, detects Sir Roger on the lonely road, follows and traps him in his cottage. Sir Roger turns his pistol on himself rather than be taken alive. Susie finds the "great love" in service for the cause of democracy and her country, with a greater love in sight.

Rosarita, a young relative of the powerful Doña Perfecta in the small Spanish village of Orbajosa, has been betrothed since infancy to her cousin, Pepe Rey Don Jose, although the two have never met. When Pepe comes to visit Rosarita, she immediately falls in love with him, but his offhand remark about the lack of enterprise in the small town alienates Doña Perfecta, and the old woman becomes determined to prevent the marriage.

Newly elected police court judge John Fairbrother is impassioned when it comes to the laws affecting the dives and cabarets of the city, and promises equal justice for all.

Three old men -- Judge Moran (George Hernandez), Roger Appleby (Jack Curtis) and Caleb Talbot (Jean Hersholt) -- are the caretakers of a young boy, Daws Anthony (Elwood Bredell). When Ray Preston (Fred Church) comes to the small Southern town where they all reside, he stirs up a load of trouble.

The story of a poor young woman, separated by prejudice from her husband and baby, is interwoven with tales of intolerance from throughout history.

Two families, abolitionist Northerners the Stonemans and Southern landowners the Camerons, intertwine. When Confederate colonel Ben Cameron is captured in battle, nurse Elsie Stoneman petitions for his pardon. In Reconstruction-era South Carolina, Cameron founds the Ku Klux Klan, battling Elsie's congressman father and his African-American protégé, Silas Lynch.

Mason, discharged from jail, promises his wife to lead a new life. While searching for work, he rescues Curly, a newsboy, from the clutches of a tramp, who, in trying to steal the boy's secret hoard, beats him up badly. Mason leaves the now helpless boy in care of his wife, and resumes his search for work.