UP!
Carl was a child Fredicksen pretty quiet, but deep down was adventurous. In the documentary film looked excited about the expeditionary Charles Muntz and his travels in distant lands airship.

And soon met Ellie, a very nice girl and wakes with shared tastes and accepted it as it was. In short, he had found his soul mate.
Together they share a lifetime, since they were children, until they are married, living good and bad times. Carl eventually became in balloon salesman. Both had the dream of going to Paradise Falls in South America, the highest waterfall in the world. They had a glass jar where they were kept eldinero saving, but prevented them reunite various expenses. Until Ellie died and unfortunately could not make the journey together.
To make matters worse, the neighborhood has been modernized with large buildings and want to demolish the house of Carl. At 78 years old seems destined to end his days in a nursing home, but he had an idea. Attempt to fulfill the dream of his life by tying thousands of balloons to his house. I did not expect was to have a traveling companion, the optimistic 8-year boy scout named Russell.
A magical adventure awaits a lost world, where they will find strange creatures, exotic and surprising, as talking dogs and a beautiful bird which Russell called Kevin. And most importantly, find new friends.