Belmundo is a smuggler who travels thousands of light years to deliver little cakes from their native planet to the Vronkiens who have remained on Earth and “bzz bzzz” to Mantiz. Except that this time round, due to a pronunciation problem, he's gone and retrieved a load of "bzzz bzz", which is in fact a dangerous liquid that causes rather unpleasant metamorphoses. But Belmundo is a shrewd businessman and has managed to liquidate this unsavory supply of goods to the most dim-witted civilization in the galaxy as a sort of consolation prize.