Retired balloon salesman Carl Fredricksen, is ready for his last chance at high-flying excitement. Tying thousands of balloons to his house, Carl sets off to the lost world of his childhood dreams. Unbeknownst to Carl, an overeager 8-year-old Wilderness Explorer Russell is on Carl's front porch! The world's most unlikely duo meet fantastic friends like Dug, a dog with a special collar that allows him to speak, and Kevin, a rare 13-foot tall flightless bird. Stuck together in the wilds of the jungle, Carl realizes that sometimes life's biggest adventures aren't the ones you set out looking for.