only 200 years ago aliens invaded earth, taking the planet for themselves and inslaveing humans as their own pets among other species. Now in present time humans are just as much animals as dogs and are treated as such by the alien owners.

Stan, Kyle, Kenny and Cartman were born into this society, and are pets of an alien that they refer to as their owner, who they live with. The owner also has a son.

Today is just a normal day for them and they are currently sitting in the living room, while Stan is laying on the couch, Kyle is on his bed and Cartman and Kenny and laying on the floor.