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     78-year-old balloon salesman Carl Fredricksen is pushed beyond his limit when builders force him to move out of his own home, where he and his late wife had built their lives. Determined to live out a lifelong dream and show everyone that he won't be living in an old folks' home, Carl ties thousands of balloons to his house and lifts off toward Paradise Falls, South America. 

     Just as the thrill of his successful sianara is sinking in, Carl realizes something horrifying: he has a stowaway an 8 year old Wilderness Explorer named Russell. Carl is unable to get the talkative and persistent whippersnapper back to the ground, and the both of them end up in South America, with Paradise Falls finally in sight.  

     Along their trek toward the falls, Carl and Russell find a strange and very large bird, whom Russell dubs "Kevin," and a talking dog named Dug who is hunting the bird. Russell wants to keep them, but Carl does not want any extra tag-a-longs. When a pack of mean dogs sent by Dug's master show up to get the bird, Carl's trip takes a whole new turn. 

     As it turns out, the dogs belong to Charles Muntz, the adventurous explorer who inspired Carl and Ellie's dreams of Paradise Falls. He is in search of the mysterious Kevin bird, and will stop at nothing to capture it. Despite his desire to stay out of this big mess, Carl finds himself right in the middle of it. At 78 years old, he is about to finally realize what life and adventure are all about.