Babs Weston agrees to marry adventurer Richard Forestall before his hasty departure, accepting his ring and promising to be faithful. Richard returns to find that his fiancée has become a "victim of jazz" and is engaged to two other men, one of whom is not yet divorced. He leaves Babs and visits his parents on their island in the Caribbean Sea, where, by coincidence, Babs and some of her thrill-seeking friends become stranded. Richard proceeds to reform the young wastrels by giving them useful occupations, and wins Babs over to a more healthful life.
Young Janet Barnes is dumped by her fiancé Ernest Morgan for Suzette Sparks, who comes from a wealthy family. Enraged, Janet sends him a photo of the elaborate and elegant mansion next door, implying that it is actually her home. Ernest replies that he and his new wife want to visit there during their honeymoon.
When Rupert's uncle tells him he must quit his writing and offers him a real job in his tannery, the young man rises in his wrath and dramatically leaves his uncle's home, saying that he will go forth to the big city and carve out his fortune with his pen. After many hardships and cold rebuffs from the cruel publishers and editors he begins to despair
Humanitarian Roberta induces her father to hire former convict, Bill, as his gardener. When she leaves on vacation, Bill steals her jewelry and eventually sells a brooch to her boyfriend, Richard, who unknowingly gives it to her as a present.
Amos Kerran and his wife live a traditional, old-fashioned life on a Connecticut farm, while their son and daughter, Arthur and Maybelle, are successes in New York society. The children want to invite their parents to the city at Christmastime but are ashamed of their unrefined appearance.
A notorious gambler and card cheat, George Forrester, rules a little western town with an iron hand. The men of the town plot to catch him cheating and do, but his men save him from danger. In the same town lives Gerald Austen, or Aitkens, who had left his tyrannical father in the east and made good in the west.
Although the prominent Hollywood family prides itself on its illustrious family tree, young Winifred Hollywood exhibits a fondness for wild adventures that greatly disturbs her parents. When Winifred becomes engaged to bank official Harold Burton, his equally snobbish parents visit the Hollywood home and are shocked by the young woman's spirited outbursts and mischievous tricks, and the engagement is broken after she decides to perform bareback feats with a traveling circus.
Four young college students find themselves with no money and a lot of debts. Each has received a peremptory refusal from home to send any more money to them and they are in despair. Suddenly Claude has an idea. They will hire Susan B. Gabonthy to lecture for them, clear about one hundred dollars apiece, and have enough to tide them over into the next term.
Daughter of an Eastern lumber king, Stephanie Trent travels in the guise of a schoolteacher to the logging village of Trentsville to search for "a real man." There she meets Jimmy Raymond, a young novelist posing as a local while writing his story. When Stephanie comes to Jimmy's cabin to report a supposed plot against him, he acts as though he intends to assault her. She nearly throws herself out the window but is stopped by Jimmy, who explains that he is working on a novel and merely wanted to determine a young girl's reactions. In retaliation, she orders that he be kidnapped and held in a nearby cabin, but remorsefully nurses him back to health when he is shot trying to escape.
John Ashby and Allene Houston, two neighboring ranchers, are in love, but their parents' violent dispute over the route of the new X. Y. Z. Railroad eventually drives them apart. Colonel Houston and the elder Ashby are killed in a fight, leaving John and Allene to continue the feud, John accepting a job with the railroad company and Allene swearing never to cross their property.
Harley Hennage, a gambler, loves Marie but remains silent when he realizes that she is in love with Oliver Corblay, a prospector. After Corblay and Marie marry, Harley moves to the distant town of San Pasqual and does not see his old sweetheart until her husband is killed while staking a claim in the desert.
At the urging of his wealthy grandfather, Willie O'Donovan is sent to boarding school by his preoccupied parents, neither of whom shows much interest in the lad. At school, where he falls in love with Mary, a country girl, Willie hears that his grandfather has died and left him $50,000,000 to be managed by whomever Willie is living with on his eighteenth birthday. Mr. and Mrs. O'Donovan, who are in the midst of divorce, both hire private detectives to bring Willie back to them, but after a series of close calls, Willie manages to avoid the detectives and take refuge at the home of Mary's mother.
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.
Betty Carlton, a pretty girl, is sent to a girls' seminary. She is welcomed by all, and everything goes along merrily until one day, when they try to initiate Betty into one of their societies by blindfolding her and dropping cold, wet macaroni through her fingers. It feels so much like snakes that she dashes from the room. From now on she is ostracized. She decides to leave. While packing her trunk. She discovers a burglar climbing into a room where the other girls are having a "feed," to which she has not been invited. All the girls scream and run away. Betty, trusting to her lariat, enters the room, captures the burglar, and is thereby made a friend of all.
Brown and his friends take an afternoon off, spending their time with some pretty chorus girls. Their wives persuade them to go to a spiritualist meeting and the medium makes the startling announcement that a man present is not true to his wife. The women demand the name of the man, and she refuses to answer questions in the meeting but promises to do so at a private séance next morning. At the appointed hour the wives arrive, and Brown and his friends try to hush up the medium, but she makes them pay dearly for her statement to their wives that their husbands are true to them.
The Baron Lafitte is in love with and proposes to Adelaide Burton, daughter of Andrew Burton, a wealthy manufacturer. Clara Lane, a newspaper reporter, has been assigned to watch the movements of the Baron. She is further instructed to make a scoop of their movements. Tom Drake is in love with Clara, and is her persistent follower throughout.
A young woman goes to visit friends but mistakenly rings at the wrong address. She is greeted and taken in out of the storm by a handsome young man to whom she is immediately attracted. What she does not know, however, is that this young man has been fleeced by her father and has sworn vengeance against him.
A dying prospector tells "Peters the Pacific" about a mine he has discovered for "the mate's girl" and the ambush he has been set upon by mine jumpers, and gives Peters the location of the mine. In town, Peters uncovers the corrupt dealings of a dance hall owner, Jim Blalock, and Peter Hunter.
Esteban, a white boy, is raised by an Indian squaw, who believes she is his mother and from whom Beaugard steals the papers documenting Esteban's birth and his right to inherit a ranch. When he grows up, Esteban falls in love with Patricia Benton, Beaugard "exposes" Esteban to Patricia, and the villain taunts the boy, telling him that he has no right to a white woman.
Passing Through is a 1921 American silent comedy drama film, directed by William A. Seiter and written by Agnes Christine Johnston, and Joseph F. Poland.