大学時代はミスコンに選ばれた美人妻。夫とは社内結婚。夫と義母と3人で暮らしている。子作りに励んでいたが、どちらかが悪いのか妊娠には至らず、段々と夫婦間で溝が出来てしまう。そんな中、水道局で働いている杉山が定期点検に訪れる。杉山はミスコンに出演していたひびきのことを以前から知っていた。ひびきに対して、執念に近い感情を抱いていて水道会社に勤めている立場を利用して接近し、監禁していく。This beauty of a housewife was crowned queen of her university in a beauty contest. She met her now husband at work. She lives with her husband and mother-in-law. They tried hard to have a baby, but pregnancy just wouldn’t come, difficult to tell if either one was at fault. A rift gradually formed between the couple. In the meantime, Sugiyama, who works at the waterworks bureau, visits for a routine inspection. Sugiyama had known about Hibiki for a long time, having seen her at the beauty contest. He has an almost obsessive feeling for Hibiki, and takes advantage of his position as a plumber to approach her and imprison her.
