Selena's cunning plan to have a look inside Birchwood Reformatory backfires and she finds herself incarcerated at the top secret facility with other women inmates. Judge Garrick sentences her to 63 days at the strict institution, during which time she will undertake physical labour, improve her education, learn obedience... and be regularly subjected to rigorous corporal punishment. The regime at Birchwood is not for the faint-hearted with Selena stumbling from one thrashing to the next, and her accumulated penalty points earn her extra special attention at Justice Night, with its catalogue of humiliating and inventive punishments.

But something is happening to Selena she doesn't fully understand. Her initial curiosity stemmed from a secret pleasure in watching other girls getting spanked and disciplined, but to her surprise, she begins not only to crave corporal correction herself, but to take sexual pleasure from it. The days are long, the sadistic wardens take pride in their work, and Selena and her cohorts have very sore bottoms...