1956 - 1957
Deep in the Scottish highlands, two young American tourists, Tommy Albright and his friend Jeff Douglass, lose their way. Suddenly, they stumble across a village which they are unable to find on their map. Tommy and Jeff enter the village fair where they meet the lovely Fiona MacLaren and the bubbly Meg Brockie. Preparations are being made for the wedding of Fiona's sister Jean and Charlie Dalrymple. As the two Americans become increasingly wrapped up in the festivities, Tommy, who has just left an unhappy love affair in New York, grows increasingly fond of Fiona, but the quaint little village of Brigadoon and its townspeople are a puzzle to him. The people don't recognize American money, and they don't seem to know what a telephone is. Tommy's curiosity increases when he finds that Charlie has signed the MacLaren family Bible with the year "1746".
Tommy and Fiona spend the day together, growing ever closer, but soon Tommy presses Fiona for an explanation about the town. She decides that Jeff and Tommy should meet Mr. Lundie, the old schoolmaster, who would be better able to explain the situation in Brigadoon. What he tells the two visitors is that, fearing evil from the outside world, he asked God "to make Brigadoon an' all its people in it vanish into the Highland mist. Vanish, but not for always. It would return jus' as it was for one day every hundred years." No villager is allowed to leave, or the spell would be broken and Brigadoon would disappear forever, but a stranger would be able to remain if he fell in love.
As it turns out, the wedding of Charlie and Jean triggers a crisis which threatens the very existence of Brigadoon. Harry Beaton, in love with Jean and heartbroken at the thought of ther marrying another man, decides to leave town to break the spell. The villagers chase after him, but when Jeff trips Harry, the man strikes his head and dies.
Meanwhile, Tommy decides that he loves Fiona and that he wishes to stay in Brigadoon, but when he hears of Harry's death and the role that Jeff has played in it, Tommy is convinced that Brigadoon must just be a dream and he decides to return to New York.
Back in New York, Tommy can't get the thought of Fiona out of his mind. Accompanied by Jeff, he returns to Scotland hoping that Brigadoon might once again reappear. As they wonder if maybe it all really was a dream, the highland mists part to reveal the bridge that leads to the heart of Brigadoon. Tommy is reunited with Fiona, to remain with her forever in Brigadoon.