『ジョーズ』を発端にしたパニック映画ブームにあやかり東映が発表した作品富士五湖の中でも地味な西湖精進湖を舞台に一大スペクタクルが展開する
A young girl stays with her estranged grandparents in the city while she waits for the results of her audition for an international performance group Her grandparents welcome her, delighted about the chance to get to know their granddaughter better While staying at the house, the girl gets to know her uncle, who suffers from a mysterious longterm lung illness and is mainly confined to bed She also observes her grandmother#39s weird religious rituals, some involving a swimming pool in the basement When the girl#39s father finds out that she is staying with his parents, he persuades his sister to visit the house to get her out, ending with a terrible tragedy