Seo-in, who has cancer, says goodbye to Su-yeon, but when she learns, Su-yeon declares that she will never be separated. But Seo-in, who has cancer, is getting colder and colder for Su-yeon, no matter what. Seo-in, who doesn't sleep because she wants to leave her alone, deliberately has sex with a woman who sells herself, and Su-yeon makes her witness the situation. In addition, Min-gyu and Min-gyu, who take care of her drunk and staggering, are invited to Min-gyu.

Jang-soo is a judo instructor who is indifferent to everyone but his daughter. One day he realizes he can see Tae-jin, a ghost who used to be a devoted police officer. Tae-jin asks Jang-soo to help solve the case that took his life away from him.

Based on actual events that took place at Gwangju Inhwa School for the hearing-impaired, where young deaf students were the victims of repeated sexual assaults by faculty members over a period of five years in the early 2000s.

Min-hee, who faces many changes after losing her husband. After her husband's sudden death, Min-hee visits Jeju Island, where her husband had always yearned and experiences a whirlwind of emotions. Mok-ha, a single mom living in Jeju Island, becomes a neighbor to Min-hee who comes down from Seoul and causes various emotional changes.