Summer 2017. News reports show the Rohingya, a population in north west Myanmar, fleeing across the border to Bangladesh with nothing but the clothes on their backs. What's happened? The Myanmar military say one thing, witnesses tell a very different story.

Amnesty's Tirana Hassan gets on a plane to Bangladesh to find out. Can she and the team gather the evidence they need to hold the Myanmar military and authorities to account?

"There was a part of me that said this can't be true, this is just so dark and violent. You had to keep asking questions because as an investigator that's your job but also as a human I couldn't understand what drives other humans to do this."