To support her sister and Alzheimer's-afflicted mother back in Thailand, Mai Ratima (Park Ji-soo (actress)) enters into an arranged marriage with mentally challenged Sang-pil (Lee Jun-hyuk). Stuck in the drab seaside town of Pohang, she endures the daily harangues of her mother-in-law and sexual harassment by her brother-in-law Sang-rim (Kim Kyung).