Documentary going behind the scenes at Facebook, the world's biggest social media company, with nearly a third of the planet's population connected to its networks. However, the company has suffered a series of deepening scandals and intense media scrutiny, with data leaks, fake news and security hacks all threatening to destroy everything Mark Zuckerberg had built. Throughout this difficult time, Facebook allowed the BBC to follow key members of the team trying to fix the problems and secure the platform.