Seventy-eight year old Carl Fredricksen goes to Paradise Falls in his home outfitted with inflatables, coincidentally taking a youthful stowaway.
Carl Fredrickson is a little boy and a dreamer who idolizes the adventurer Charles Munts. When he meets Ellie, who also worships Munts, they become close friends. However Charles Munts falls into disgrace, accused of forging the skeleton of the monster of Paradise Falls. He travels in his blimp to South America to bring the monster back alive but is never seen again. Eventually Carl grows up and marries Ellie. They promise each other that they would travel together to Paradise Falls and build a house there. Many years later, Ellie dies and Carl, who's lonely, refuses to move from their house despite the offers of the owner of a construction company. When Carl accidentally hits a worker that damaged his mailbox, he is sentenced to move to a retirement home. However, he uses many balloons to float his house in order to travel to Paradise Falls. Adventure ensues.
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