Yuko is married into the Tanaka family who runs a chicken farm and lives a modest life despite being bullied by her husband's sister, Satomi. One day, Saki, a mistress of Yuko's husband, Ryosuke, visits their house by applying for a live-in employee position at the chicken farm. After the interview, in front of all the family members, Saki confesses that she is Ryosuke's mistre...