Sean Rigg dies in a caged area in Brixton Police Station in August 2008 and the Independent Police Complaint Commission (IPCC) are called in to investigate. Sean's family are shocked at the death and this soon turns to anger when the government appointed IPCC begin to make error after error in its inquiry - is it incompetence or collusion? Sean's family begin a four year struggle to investigate the death themselves and in the process ask 'Who Polices The Police?'