a long time ago in a universe on your TV set you went to the park with your friend rex and saw the strangest group of people there was a blue jay a ghost and an old man with a gigantic head they said the blue jays name was mordecai and mordecai introduced me to his friend rigby so rigby said the big headed old guy was pops the beast guy was skips the gumball machine was benson the green guy was muscle man and the ghost was high five ghost guess what he likes to give out high fives!!! rex is no regular kid he knows about these things called nanites and he needs to go back to his world to test some new nanite tech mordecai and rigby have allways wanted to travel to the other worlds in the universe so now you need to choose take them with you or go with out them