Laura and Grace Snider both need dates for the annual Spring Dance, but those they have their eyes on seem not to be interested. Caroline shares with them a 'womanly wile' she used on Charles to get his attention, but when Laura and Grace try it the consequences are not what they had hoped for. Then Charles reminds Caroline of what actually happened when she tried it on him, and she changes her advice to Laura and Grace, with a happier outcome.

A widowed mother named Julia Sanderson (Patricia Neal) learns she has a terminal illness and, with no close relatives to care for her three children, John Jr., Carl and Alicia, she gets Charles to promise to find the children a new home after she dies. Meanwhile, Laura and Mary rescue some abandoned puppies, and the relationship between Mr. Edwards and Grace Snider begins to blossom.

After Julia Sanderson's death, her three children stay with Grace, with help from Mr. Edwards. When Charles is unable to find someone to adopt all three children, he has to make the difficult decision to place them in separate homes. At the very last minute, Mr. Edwards makes a monumental decision: he marries Grace - and they take on all three children.

The Olesons get themselves invited onto the Ingalls family campout, after Nellie complains that it will give Laura and Mary an advantage for the school holiday project of leaf-collecting. The two men bond while fishing and their wives try to improve their relationship, but the children continue to clash. However, when Nellie falls into a river, her later false account of what happened brings out the same Mrs. Oleson. Back at the school, the result of the leaves project gives some satisfaction to Laura and Mary.

While fishing in a stream, Laura and a friend stumble upon "gold". They spend several weeks trying to pick up all of the gold. When they bring it to the bank, they learn that it is only fool's gold.

John is a lot more interested in books than farming or hunting. Mr. Edwards tries to make him different and buys him a gun for his birthday.

Laura and Nellie are rivals for the affections of a classmate's heart. The two polar opposites are after Jason, the new kid at school who is into inventions. Both of them have crushes on Jason, but Jason - who is into inventions and electricity - only has feelings for Laura...

Mary is excited when she has the chance to participate in a state-wide math competition. The problem is that Charles can't afford to have her go.

Charles and his girls go on a trip, while Caroline stays home. Just before they leave, she gets a scratch on her leg by a rusty nail. At first, everything seems OK. However, as time progresses, she gets weaker and more ill.

Mary, Laura, and Mr. Edwards' adopted son, Carl, go along with Charles and Mr. Edwards to a train station. The three children wander into the caboose. The caboose then begins to move backwards, going faster and faster. Another train is coming the opposite direction...

When Miss Beadle can no longer handle the older students' bullying, she is fired. Her mean-spirited succecssor immediately clashes with Laura, and unfairly blames her for several incidents in the classroom.

Charles, Mr. Edwards, and two other men take a job that involves handling and transporting explosives. They must deal with many things along the road, including prejudice.

Charles takes a job refinishing woodwork for Thurman in exchange for a nice set of china to give to Caroline. Widow Thurman was a lovely, young lady. To keep his secret, Charles had to lie. After he tells the girls and Caroline different stories, everyone suspects that Charles is having an affair.

The Independence Day celebration in Walnut Grove is threatened when taxes are increased. A Russian immigrant shows the people why America is a great place. Even though the immigrant lost his land since he couldn't pay his taxes, he was happy to be in America. He considered it to be the best place to live in the world.

The son of Mrs. Whipple returns to Walnut Grove after serving in the Civil War. To forget his painful past, he takes morphine, which he becomes addicted to.

After a tornado ruins his crop, Charles decides to sell the land and return to the Big Woods of Wisconsin without consulting his family.

Poor economic conditions cause the Ingalls to move closer to Mary. Mary is now teaching at the blind school. The Ingalls move to be closer to Mary, where she helps teach the younger blind students. Laura catches an orphan, Albert, stealing from their hotel. Charles becomes friends with Albert and invites him to Mary's birthday party.

Charles even sells his fiddle to buy Mary a gift. At the party, Mary gives Pa his fiddle back. Laura gives Mary a card. Mary is so proud of Laura writing the letter in braille. Almost everyone is in tears, including Mrs. Oleson, when Mary announces that she has nothing to wish for, since she has everything that she could possibly want.

A blind student feels he is useless. He is reluctant to do anything at the blind school. The student gains self-confidence when he is talked into being the center for the Winoka football team. He is able to throw Albert across the goal line during the game to score the tying touchdown for the Winoka Warriors, keeping the Warriors from losing.

Amelia, a new girl that Laura meets in school, is ashamed of her very overweight father. Her father works at the blind school where Mary works. All the blind students like him a lot. They claim that they can see his love. One day, Laura and some other students from school, start making fun of the overweight person, not knowing that they were making fun of Amelia's father. Amelia's father pretends to leave town since his girl is so ashamed of him. He hides out at the blind school. When he is involved in an accident, Amelia reveals to her dad how much she loves him.

Toby Noe wins a lottery of $5,000 and becomes a man of means. He buys the children a cartload of fireworks, for an annual celebration. Standish dupes Toby into losing all his money using cards and drink at the saloon. Everything comes to a head as the fireworks go off in the saloon. The Ingalls, Olesons, and Garveys get tired of the bustling city life during all this (Nels getting drunk and wins a whole pile of money), and they decide quickly to return to Walnut Grove. The Ingalls take Albert along with them.

As the Ingalls, Garveys and Olesons return to Walnut Grove they discover a town that is badly in need of repair. With a lot of hard work, from everyone around them, they're able to get the town back to its old self, helping a number of people who feel they are living in a dead town, like Lars Hanson.

Laura feels ignored and left out when Charles spends all of his time with Albert and the calf given to Albert. Albert runs away after overhearing Charles and Caroline talking about Laura not feeling that she is part of the family anymore. Laura takes Albert's calf to the fair and wins first place. She dedicates the award to Albert. Albert, who is secretly hiding and watching the show, comes out when he hears Laura's heartfelt words.

Mrs. Oleson's cousin starts a newspaper in Walnut Grove, and she uses the fledgling small-town publication as her forum for gossip. It isn't long before the newspaper creates havoc and embarrassment for the townspeople, leading Charles to take matters into his own hands.

Adam finally asks Mary to marry him. She begins having second thoughts when her parents starting talking about being grandchildren and how hard it was to keep track of Mary when she was little. Mary begins to wonder if she could take care of a child. A blind child gets caught in a dust storm and is found by Mary and Adam. After this, Mary realizes that she has nothing to worry about. They get married by Reverend Alden.