 A bunch of 7 orphan cavemen grow up on a little island all by themselves. After a fire burns all vegetation they set out to find a new place to live. Here, one day they trap a strange animal, looking very similar to them, only softer and with longer hair. She (Filli) feels attracted to one of the brothers (Ulli) and convinces him, that a certain kind of playing with each other is far more satisfying than just eating her. He hides her and serves the other cavemen a goat. Soon Ulli and Filli are playing the Johnson-Game quite frequently. But the others find out about this and want to see what s so great with "johnsonning". After they all force Filli to show them the game too, she manages to flee with Ulli. Being pursued by the 6 men of Ulli s clan, they meet the rest of Filli s clan: A tribe of about 150 unsatisfied women, who just love to have new men around for playing.