Rocko is a wallaby who left Australia and immigrated to the USA, settling in O-Town where he attempts to lead a normal suburban existence in a city which has no parallel lines. His best friends are a cheerfully obese and dimwitted steer named Heffer who was raised by wolves, a neurotic turtle called Filburt, and his dog, Spunky, who drinks his own saliva. He works in a comic store. His neighbours are toads, the Bigheads. They have salmon-bushes in their yard. Ed Bighead works for a company called Conglom-O, and their son produces a TV cartoon within the show.