Shadows of the Moulin Rouge

A group of Canadian Royal Mounted Police officers arrive home after serving overseas with the Allied Army. After enjoying a birthday banquet for the aged Major Manners amid much singing and revelry, Inspector Turner reveals suspicions about a new recruit, John Smith, whom he knows to be using a pseudonym and whose war record contains something potentially damaging.

Serama, the consort of Lucifer, is driven from Paradise by the Archangel Michael, who commands Conscience to enter human souls to judge and punish them. In the main story, society girl Ruth Somers, a reincarnation of Serama, prepares to marry Cecil Brooke, the wealthiest man of her set. Her guardian, Dr. Norton, an incarnation of Lucifer, constantly accompanies her. Ruth is summoned to the Court of Conscience, where the witnesses, Lust, Avarice, Hate, Revenge and Vanity, testify about Ruth's history of seducing and abandoning men. This behavior resulted in the suicide of Madge, the lover of Ned Langley, whom Ruth enthralled and promised to marry, and also the deaths of two rivals for her love. Ruth is ordered back to earth to learn her sentence. When Ned interrupts the wedding, Ruth scorns him and he shoots himself. After Brooke leaves her, the Court dooms Ruth to live with the torment of remembrance. Ruth sends Norton away, and then kneels and repents.

Former miner Daniel Slade becomes a wealthy investor and runs for political office, ultimately becoming the governor of his state. Daniel's wife, Mary, is unable to adjust to a life in high society, often embarrassing him in the presence of his colleagues. Temptation arrives in the form of Katherine Strickland, the daughter of a prominent senator, who takes Daniel away from his old-fashioned wife. However, Daniel eventually realizes how much he loves Mary, and he returns to her.

Former Viennese orchestra leader Anton von Barwig has been searching for his daughter, taken by his ex-wife, for many years. The search has reduced him to penury since a crooked detective swindled him. One day he meets a young society girl, Helene Stanton, seeking music lessons for her fiancé, Beverly Cruger, and recognizes her as his child. Barwig finally confronts her foster father, who had run away with his wife in Vienna, who pleads with him to stay silent for his daughter’s future. He acquiesces but Helene discovers the relationship and brushes social considerations aside to be reunited with him.

Conchita Cordova sings in the cathedral choir in her village of San Miguelito near the Rio Grande. Millionaire oil man John Rannie, whose oil fields have displaced the peasants, desires Conchita, and when he learns that her fiance, Juan Mendoza, has been employed by Adolf Wylie, a German spy, Rannie threatens to expose Juan unless Conchita gives herself to him.

Two sisters, Julia Crossland and Evelyn Jefferson, happy lives are thrown into turmoil when a man from their past, Thomas Chadwick reappears unexpectedly. Both had at one time been smitten with Thomas writing indiscreet letters to him. When Chadwick is killed, they fear their secret will be revealed.

When a train crash kills Horace Barney, the heir to a fortune that his doctors and guardians were planning to extort the unscrupulous trio quickly substitute his double Jack Trevor who by chance was on the same locomotive but knocked unconscious. Once awakened, Jack realizes the duplicity but plays along to try and foil the plot and save the estate for Barney’s cousin Helen who is the true heir and with whom he has fallen in love.

Joyous Johnson is expelled from college and finds work as a publicity agent for the Coronado Hotel. At the hotel, he falls for Marjorie Milbank, a businesswoman visiting to discuss the sale of her Texas cattle ranch with Joyous's father. Unknown to Joyous, his father desperately needs Marjorie's ranch to save his failing packing house, but she refuses to sell. Joyous must navigate his new job and his father's business crisis while trying to win Marjorie's heart.

Poverty forces Jill Mackie to work in a department store, where she falls in love with its owner, Charles Hemingway. They form an illicit alliance when Mrs. Hemingway refuses to grant Charles a divorce. Eventually, Hemingway becomes ill and dies, leaving Jill a sum of money. She leaves the country and falls in love with a young man to whom she confides her past, but breaks with him when he suggests that they make a similar arrangement.

A woman writes about her sister's tragedy, vowing to help others in similar situations: Because Bettina longs to leave her country home, her loving mother sends her and her serious-minded elder sister to London, accepting their aunt's invitation to visit and allow Bettina to be introduced to society. The girls' dressmaker steals the aunt's photograph and sends it to a woman who, disguised as their aunt, leads the girls to a brothel. After the elder sister escapes, aided by her concerned male companion, she races in a cab to her aunt's home, but is frustrated in her attempt to rescue Bettina by her aunt's infirm state, the inefficiency of the police, and her own inability to remember the location of the house. She finds her cab driver, but he is drunk and soon dies in an accident. After falling ill, the sister, convinced by a dream that Bettina has died, resolves to devote her life to saving other women.

Rich wastrel Baron Chevrial fritters his days and nights away pursuing a series of young lovelies and playing with their affections. He is smitten with the charms of Rosa, dancer of the Opera Comique, but marries the prominent Therese Beauchamp while still remaining involved with Rosa. Eventually a new woman enters his life and for a time he is oblivious to everything else until Rosa reenters his sphere.

Wealthy New York contractor Wilton Demarest falls victim to the wiles of beautiful adventuress Mazora. Soon, he becomes addicted to drugs, neglects his wife and child, and his business is on the verge of ruin. By chance he meets his double, western mining engineer Martin Stanley. Demarest, half mad due to his drug addiction, conceives the fantastic idea of having Stanley take his place in the world enabling him to indulge in his degraded desires. Stanely, penniless and alone in the world accepts the proposition despite his reservations. Demarest drops into oblivion and Stanley picks up the scattered threads of his life, both in business and at home. The "at home" part is what causes complications.

Seth Cartwright abandons his mistress Bernice Archer and their child, Lorna returning to his wife and son. Bernice, in a daze, leaves Lorna, who is adopted by Cartwrght's wife, who knows full well who the child's father is. Unfortunately, she and her husband are killed in a shipwreck, but it turns out Lorna and her real mother are reunited because of the wreck, and settle in a small seaside town. Matters get complicated when Seth Jr. arrives in the town for a vacation and falls in love with Lorna--not knowing that she is his half-sister.

Orphaned Gertrude "Gertie" Flint is rescued by lamplighter, Trueman Flint, who raises her with faith and virtue until she grows into a moral woman and finds love with a childhood friend, overcoming hardships like her blind mother's separation from her and near-fatal fire incidents, ultimately leading to happy reunions and an engagement.

After being disinherited by their wealthy father for their wild and irresponsible ways, two brothers embark on vastly different paths. One turns to crime and the other follows the straight and narrow falling in love along the way. When their paths cross again both find their lives in danger and only one will emerge safely.