Stacey Dooley embeds herself on the frontline with the extraordinary all-female Yazidi battalion, who are fuelled to take revenge against Isis.

Stacey Dooley, one of BBC Three's most popular journalists, travels to British Columbia and Alberta to explore why this is happening, and investigate what is being done about it.

She starts her journey on a remote road dubbed the Highway of Tears where dozens of woman have vanished or been murdered since 1980 whilst trying to hitchhike. Determined to find out why this is happening and who is taking the girls Stacey travels to the city of Edmonton, to meet women working in the sex trade that are at high-risk, some reveal disturbing stories of violence and fear.