In the Middle Ages, Prince Edmund the Black Adder constantly schemes and endeavors to seize the crown from his father and brother.

Opening tune singer: The sound of hoof beats 'cross the glade / Good folk, lock up your son and daughter / Beware the deadly flashing blade / Unless you want to end up shorter / Black Adder, Black Adder, he rides a pitch black steed / Black Adder, Black Adder, he's very bad indeed / Black: his gloves of finest mole / Black: his codpiece made of metal / His horse is blacker than a vole / His pot is blacker than his kettle / Black Adder, Black Adder, with many a cunning plan / Black Adder, Black Adder, you horrid little man.