"In 1930, Lemuel Siddons, a saxophonist in a traveling band, dreams of becoming a lawyer. When the band's bus rolls into the small town of Hickory, he abruptly quits the road and takes a clerical job in the general store owned by John Everett Hughes. At a town civic meeting, Vida Downey catches his eye—the bank teller he first saw on his first day in town—and he begins courting her, even as she trims the town’s youth programs, leaving only the Boy Scouts to keep the boys off the streets. He volunteers to become Scoutmaster of Troop 1, hoping to guide the town’s young people toward steadier lives.
Over time, Lem grows into an all-around natural leader, choosing to invest in the boys’ growth rather than chase his old dream of law school. Meanwhile, the town’s troublemaker, Whitey (Edward White Jr.), refuses to join the troop. One night, while Lem and Vida are on a date, they catch Whitey stealing from Hughes’ store after hours. Whitey falls and sprains his ankle, and Lem patches him up using techniques from the Boy Scout Handbook. Impressed, Whitey secretly steals the book, and Lem allows it, recognizing his own past self in the boy. One night, Lem invites Whitey’s father, Edward White, Sr., to parents’ night at the Scout meeting place on the lake property owned by Hetty Seibert, the bank’s owner and Ralph Hastings’ aunt. Edward arrives drunk and embarrasses Whitey, causing him to quit the troop. Yet Edward dies later that night of alcohol poisoning, leaving Lem and Vida to adopt Whitey.
Years later, in 1944, Lem is out with his troop when he is accidentally captured by the United States Army during a war game in the area. He is mistaken for a spy because of his Scout gear, and he cannot prove he is a Scoutmaster after a military captain asks him to tie a sheepshank—the one knot he never learned. Across the lake, Troop 1 fires their morning cannon, signaling the war-game attack. The scouts shelter in a staged base and, with quick thinking and improvised action, they manage to capture a tank using explosive squibs, freeing Lem from an embarrassing moment of captivity.
Back at the lake, Lem and the troop learn that Ralph Hastings is suing Hetty Seibert over the lake property, claiming she is mentally unstable and needs a guardian to manage her finances. Although Lem never passed the bar, he is allowed to participate as an interested party and question Hetty on the stand. His probing reveals that the property was once the site of her family cottage, which burned down in September 1918, two days after she learned her sons were killed in France. Hetty explains she permitted the troop to meet there because the boys reminded her of her late sons, and she shows that she understands Ralph’s scheme to use the land as a tax haven. Hetty wins the case, and the troop is allowed to keep the property.
On September 1, 1945, Lem and Vida celebrate Hughes’ birthday by listening to Harry S. Truman announce the end of the war over the radio. Whitey, now a captain in the army, returns to Hickory to introduce Lem and Vida to his wife, Nora, an army nurse Nora White. In 1950, Hughes passes away, leaving the store to Lem and Vida. Because Lem’s health prevents him from continuing as Scoutmaster, the town honors his two decades of service with a surprise celebration on October 2, 1950, and dedicates Hetty’s property as Camp Siddons in Lem’s honor."
