Thanks to a strange crystal, a shy student finds himself in the Stone Age, where he falls in love with a beautiful cave woman and helps her clan stave off a tribe of cannibals.Thanks to a strange crystal, a shy student finds himself in the Stone Age, where he falls in love with a beautiful cave woman and helps her clan stave off a tribe of cannibals.Thanks to a strange crystal, a shy student finds himself in the Stone Age, where he falls in love with a beautiful cave woman and helps her clan stave off a tribe of cannibals.