Google, Apple and Facebook-owned Instagram are enabling an illegal online slave market by providing and approving apps used for the buying and selling of domestic workers in the Gulf. BBC Arabic's undercover investigation exposes app users in Kuwait breaking local and international laws on modern slavery, including a woman offering a child for sale. The discovery of Fatou in Kuwait City, her rescue and journey back home to Guinea, West Africa, is at the heart of this powerful and shocking investigation into Silicon Valley’s online slave market.