DCI Hanlon faces the toughest decision of her career as a string of political murders lead to a deadly confrontation.

A controversial, right-wing German politician is due to speak at the Oxford Union. Following a series of murders linked to a violent anarchist group, the city is on high alert. DCI Hanlon has been partnered with DI Huss to ensure the speech goes smoothly and that there will be no more killing.

The murders soon reveal a chilling alliance between the anarchists and European Jihadis. And when Hanlon traces the killer, she soon realises that the truth has a terrible price. Is Hanlon willing to meet the cost?