Stacey Dooley travels to Florida - where sex offenders are punished forever. After serving their sentences, paedophiles and other sex offenders face legal restrictions for life.

But there is a battle raging in the American state about these laws. Do they truly protect children, or just make the public feel better? And the crucial question Stacey explores during her trip: do they ever deserve a second chance?

Stacey spends time with convicted sex offenders living in a homeless camp in Miami and an isolated community in the middle of nowhere - both consequences of strict laws preventing them from living less than 2,500ft from a place where children congregate. The offenders she meets hope to be fully reintegrated into society, having committed crimes ranging from watching child pornography to molesting children - but are blocked by the strict laws which restrict their movements for life.

She also meets with Senator Lauren Book, and her father, lawyer and lobbyist Ron Book, who have campaigned for more than 20 pieces of sex offender legislation - including the 2,500ft residency restrictions in Miami - discovering that Lauren herself was abused for six years as a child by the family's live-in nanny.

In Florida, Stacey struggles to come to a conclusion about whether sex offenders deserve a second chance, in the face of the harrowing experiences of victims and heinous crimes committed by offenders, especially when unexpected revelations along the way make her question everything she has learnt from the offenders she has got to know.

Stacey comes face to face with ISIS as she revisits Iraq to unearth the harrowing story of Yazidi women kept as ISIS sex slaves. She is accompanied by Shireen, a Yazidi woman who was kept as a slave in Mosul before managing to escape during the battle to regain the city. Stacey helps Shireen retrace the steps of her torturous past, revisiting parts of the city which played a significant role in Shireen's ordeal. Their journey culminates in a face to face exchange with an ISIS fighter who claims to have killed over 900 people, and raped over 250 women.

Their first stop is the house in Mosul which Shireen was taken to, held hostage and routinely raped by her captor. She shows the room in which she was held, with a curtain she fitted and the initials on the wall of her ISIS captor and his wife. Shireen takes Stacey to one of the former markets that were set up to trade the women. Although nothing but rubble is left the effect on Shireen is profound and she wants answers to why this happened.

The next day, escorted by an Iraqi Commander, they search through the decimated city to locate Shireen's escape house. However, during their hunt she is cut off from answering Stacey's questions about her experience by the Commander.

Finally their trip ends in a small room outside the city where they sit face to face with Amar, a 21 year old ISIS fighter. Anmar took part in the raid on Shireen's home city and had three Yazidi sex slaves of his own. Shireen is finally able to challenge him on why this happened, why he did it, and how he feels about the atrocities he committed now.