Jun-yeong and Sook-hyang, who have been married for 5 years, are a couple who seem to be unhappy. Because of Sook-hyang's insensitivity, their marriage weakens. One day, Sook-hyang met her first love, Yeong-min and his wife, Mi-seon. Sook-hyang receives a shocking invitation to have sex together...

• Han Seok-bong
• Kim Ji-ah
• So Jeong
• Kang Min-woo