78-year-old Carl Fredricksen travels to Paradise Falls in his house equipped with balloons, inadvertently taking a young stowaway.

Alpha, Beta, and Gamma try to keep Dug out of their way while they hunt for Kevin the Snipe. However, their instructions for his "very special mission" keep backfiring on them.

An adventurous 11-year-old girl finds another world that is a strangely idealized version of her frustrating home, but it has sinister secrets.