Hong Jeong-hye is sentenced to serve 10 years in prison after killing her abusive husband. Pregnant at the time of her arrest, she gives birth to a baby boy behind bars but must give him up for adoption according to the law. One day she sets out to start a choir with the help of Kim Moon-ok, a fellow inmate on death row for killing her adulterous husband and mistress. The prison chief promises her a special outing with her baby if she succeeds.