A disillusioned Seoul woman visits a remote island to reconnect with a childhood friend, only to find her trapped in an oppressive cycle of physical, mental, and sexual abuse. As tensions escalate, the situation spirals into a harrowing tale of survival and retribution.

Jeong-hye gives a birth to a baby boy in the prison. Her and other inmates create a women's choir to compete in the national choir contest, to meet and greet their families and loving ones.