Genius mad scientist Rick Sanchez takes his irritable grandson Morty Smith to surf the universe. Together, they find dangerous adventures in different dimensions of the multiverse, which cause problems with the other members of the family, and with people at school.
In an imaginary world, there are four groups of people who can use and manipulate the four elements: earth, air, fire, and water. Rare people—one per generation—are able to combine all four kinds of magic. Only an Avatar can stop the warlike people of fire from overcoming other groups and bring life back into harmony.