Set on Jeju Island, Seok-Geun (Lee Sung-Min) is a middle-aged man and he works as a taxi driver. He is married to Dam-Deok (Jang Young-Nam). Seok-Geun constantly cheats on his wife, but it doesn't mean he does not love his wife. Meanwhile, his younger sister is Mi-Young (Song Ji-Hyo) and she is married to Bong-Soo (Shin Ha-Kyun). They live right next door to Seok-Geun and his wife. Mi-Young and Bong-Soo runs an Italian restaurant, but their restaurant isn't doing very well. Bong-Soo wants to convert the restaurant to a Chinese restaurant, but Mi-Young ignores him. Bong-Soo can't understand his brother-in-law's proclivity to have affairs. Everything changes when Je-Ni (Lee El) appears in front of Bong-Soo.