Hundreds of children in Turkey's Kurdish south-east have been jailed for taking part in anti-government protests, and are treated no differently from adults.

Berivan Sayaca is an attractive, 15-year-old Kurdish girl with black, wavy hair who loves horse-riding and playing the guitar.

She is also a convicted terrorist - serving an eight-year sentence in the high-security prison in Diyarbakir, the largest Kurdish city in Turkey. How she got there is a tale that could be straight out of Kafka, that exposes one of modern Turkey's darkest sides.