The TARDIS crew lands in the Himalayas of Cathay in 1289, their ship badly damaged, and are picked up by Marco Polo's caravan on its way along the fabled Silk Road to see the Emperor Kublai Khan. The story concerns the Doctor and his companions' attempts to thwart the machinations of Tegana, who attempts to sabotage the caravan along its travels through the Pamir Plateau and across the treacherous Gobi Desert, and ultimately to assassinate Kublai Khan in Peking, at the height of his imperial power.

A New York fur saleswoman falls for a man she meets on the subway and must decide if she wants to accept a much dreamed for work transfer to Paris, or stay and get married.

Baron Tolento lusts for Diane Delatour, his physician's wife, and donates money to their favorite charity, a children's home, in hope of gaining her favor. When Delatour is called away, Tolento inveigles Diane into attending a party at his house. There he threatens to ruin her husband if she does not submit to his demands within three months. Diane retaliates by showing him a letter proving that Tolento has only three months to live, according to a specialist. Delatour learns of his wife's presence at the party from one of the baron's women, and when Tolento makes Diane heir to his fortune, he becomes convinced of her infidelity.

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Stars Edmund Lowe as WWI veteran Slim Paris. Though most of his comrades died in battle, Paris returns home with nary a scratch. This convinces him that his life has a "greater purpose" in the scheme of things, so he sets about to find that purpose.

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When New York playwright Richard Warrington returns to his home town, Republican bosses nominate him for mayor. The Democrats, alarmed at Richard's popularity, decide to unearth a scandal that will ruin his chances of winning and quickly discover that, months before, actress Katherine Challoner had spent the night in Richard's apartment. Although it simply had been the result of Katherine's fainting spell, the home-town Democratic newspaper turns the overnight visit into an illicit rendezvous between two lovers.

Just previous to his departure for South Africa and the Boer War, Gordon Frazier, a young officer in the English Army, bids an affectionate farewell to his fiancée, Gladys Mayford. In Africa, engaged in battle, Gordon is rescued from death by a young soldier, with whom he formed a slight acquaintance.

During an annual celebration in which English peasants and aristocrats mingle, the Duke of Loame is thrown from his horse and saved by Ivis Benson, the daughter of a tenant farmer. Both injured, they fall in love, to the dismay of his mother and Lady Eileen, his intended bride.

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.

A married farmer falls under the spell of a slatternly woman from the city, who tries to convince him to drown his wife.

When penniless Westie Phillips briefly meets wealthy Martha Gorham, he falls in love, but Martha forgets the encounter. Harry Arnold, courting Martha, invites her out sailing and arranges to have the yacht wrecked near an uncharted island so that he can be alone with her until rescuers arrive. Meanwhile, without knowing Martha is on board, Westie secures a position on the yacht.

Although Kenneth Carmont and Esther Saunders, criminal Bert Saunders' sister, love each other, Esther marries detective Elwood Collins, who agrees to stop pursuing Bert if she accepts his proposal. One night, Kenneth and Esther hide Bert, who has escaped from the police. The same night, Kenneth's father is murdered. The evidence implicates Kenneth, who cannot supply his whereabouts at the time of the crime, as that would give away Bert. Esther cannot clear Kenneth for the same reason, and because it would let her husband know that she was with her former sweetheart.

For Nita Valyez, who is half-Spanish and half-Irish, Carlos represents potential violence and danger, two things to which she is both attracted and repelled. In contrast, she has only a passing interest in Big Jim, the town's honest, good-hearted sheriff. Then, after Carlos kills a faro dealer, he forces Nita to make an escape with him.

In their small village, Romanian peasant girl Katinka Veche falls in love with the studious Jan Drakachu. Jan wins a scholarship to an American university eventually becoming a successful engineer. Unbeknownst to him, Katinka, whom he had to leave behind in the village, is sold into slavery by her cruel, dissolute father. Her owner, Victor Dravich, beats her into submission forcing her to become his mistress in his Syrian gambling den. When the house is raided, Dravich takes her on his travels around the world until they finally settle in a small Arizona mining camp. Broken, she sees Jan but is too ashamed to speak to him sending instead for her old tutor Boris. Upon arrival Boris kills Dravich but is shot by the sheriff. Katinka, now free, follows Jan to New York. After further travail the pair are finally reunited.

When Mary and Fannie Graham, daughters of a good mother but a father with criminal instincts, are left motherless, Mary flees from her unhappy surroundings while Fannie, inheriting her father's disposition, remains and is raised as a thief.

Tommy Buckman, the ne'er-do-well son of dime store magnate John Buckman, is given one last chance to succeed by surveying a possible location in New England for the opening of another store in his father's chain. Arriving in the town of Winton, Tommy lands in jail and, disowned by his father, is bailed out by Nina Potter, whose father owns the only dime store in town.

From a Montana mining camp, a young man progresses to the society heights of New York, making his mark publicly as a dancer, but secretly as a gentleman burglar.

Karl Sterner falls for Jenny, a beautiful young woman from an impoverished background, and soon discovers that he cannot control her willful personality - which proves to cause many conflicts in their marriage.

Lisetta, the daughter of a fisherman, lives with her father and brother on the island of Capri. When Serrani, an Italian who has grown wealthy in New York, visits the island, he induces Lisetta to accompany him to America. There he abandons her and she becomes a dancer in an underworld café owned by "Dago" Joe, where she meets the artist Stanford Graham, who employs her as a model. Meanwhile, Lisetta's brother Domenic comes to New York to avenge his sister's dishonor.