Paul, a computer whiz who spends more time with his machine than with his girlfriend, finds that he has been chosen as a worthy opponent for Mestema, an evil wizard who has spent centuries searching for a challenging foe. After having his computer changed into a wristband weapon, Paul does battle with a variety of monsters before finally coming face to face with the ultimate adversary.

In this sequel to Les Bronzes (1978) summer has passed, but that doesn't mean the fun has to end for Bernard, Nathalie, Gigi, Jerome, Popeye, Jean-Claude, and Christiane.