Carl Fredericksen once wanted to be just like his childhood idol, the great explorer Charles Muntz. Now, a lifetime later, Charles is sad and alone, missing his beloved wife...and waiting for the end. But little does he know the adventure has just begun! To escape a life in a retirement home, Carl rigs his house into a makeshift hot-air balloon and floats away...with an unexpected stowaway on board. This stowaway just might help Carl learn that it's never too late for adventure!