A man meets a married woman and spends one night together before parting ways. As time passes, he reminisces about their encounter - a memorable fling with housewife Matsui Megumi (then 34 years old). Director Takahashi Koichi has compiled two films featuring her first trip and their reunion into this collaborative edition volume four! In "#155," the couple faces disaster when the husband suffers memory loss due to an accident. Fearful and heartbroken, the wife embarks on an adulterous journey. In the special episode "#155 Continuation ~Pure Lies~," three months later, the distraught wife sets out on another trip seeking solace from her pain. This film tells the story of a loving couple's pure love for each other...

ひとりの人妻と出会い、一夜を共に過ごし別れた。そして、刻は流れ…記憶に残る人妻との邂逅─。人妻桃恵（当時34歳）の最初の旅と、再会を果たした旅の2作品を監督・高橋浩一が編集し収録した合作版第四弾！ 「人妻不倫旅行 ＃155」愛し合う2人に突然降り掛かった災難。事故で記憶障害を患った夫…心細さと恐怖を抱えた人妻は背徳の旅へ。 「特別篇 ＃155続 ～優しい嘘～」3か月後、悲痛な思いに押しつぶされそうな人妻は救いを求めて旅に出た。お互いを想い合う夫婦の純粋な愛の物語が綴られる…。