After the incident at the hotel swimming pool, all the four mothers are brought to the police station, interrogated, and confined. During this time, their hidden secrets and misunderstandings are revealed. Hwa Sook finds out that her husband, Seung Soo, is not having an affair with Ji Ae. However, she also finds out that he is actually Byung Hak’s secretary. Meanwhile, Ji Ae questions Hwa Sook’s current relationship with Seung Soo and suspects that they are not divorced.