Overeager Wilderness Explorer Russell and a talking dog, Dug, tag along for the ride on Carl's house, which is carried through the sky by hundreds of balloons.
Up follows the touching story of the elderly widower Carl Fredricksen, who goes on an adventure across the South American wilderness to fulfill a promise he made to his late wife, Ellie. Overeager Wilderness Explorer Russell and a talking dog, Dug, tag along for the ride on Carl's house, which is carried through the sky by hundreds of balloons. They soon find themselves facing off against a dangerous squadron of dog pilots, as the duo of Carl and Russell embark on the unexpected adventure of a lifetime.