Fate has turned the tables on the inimitable Donkey Kong. After Mario saved the Beautiful Girl from the lustful clutches of Donkey Kong, he led the brokenhearted ape into captivity, locking him behind steel bars, never again to strut his stuff before the fair maidens of the world. As the frustration of confinement enrages Donkey Kong, Mario complacently stands guard over the cell, holding the sought after key to freedom. But wait! Unbeknownst to Little Mario, Donkey Kong has produced an offspring - Donkey Kong Junior! A death-defying little monkey, shrewd and cunning, who resists all enemies to rescue Papa Donkey Kong. As Mario's brigade of snapping jaws, ape-eating birds and energy pods launch their offensive, Junior bombards them with a fusillade of Fruit Bombs that aim to annihilate his every foe.