In 2010, just as the Indian government was stepping up its counterinsurgency operations in the country's Naxal-affected areas, Alpa Shah set out on a seven-night march with a guerrilla platoon across 250 kilometres of the same territory. An anthropology professor, she wanted to understand why, against the backdrop of a shiny new India, the country's poor had shunned the world's largest democracy and united with revolutionary ideologues.

Dressed as a man in an olive-green guerrilla uniform, Alpa was the only woman and the only person not carrying a gun in the platoon. Her gritty journey reveals how and why people from very different backgrounds come together to take up arms to change the world but also what makes them fall apart.

Unfolding like a thriller and brought to life by Alpa's years of research and immersion into the daily lives of the tribal communities in a Naxal stronghold, Nightmarch is a reflection on economic growth, rising inequality, dispossession and conflict at the heart of contemporary India.