In sun-soaked Mauritius, a retired Law Lord is brutally murdered, while in rain-sodden Manchester, the Labour Party conference is beginning. Promoted to Greater Manchester Police s Counter Terrorism Unit, Detective Constable Iona Khan s first case appears to be a trivial use of false identity regarding a Sri Lankan student asking suspicious questions about Manchester s tunnel system. But when she learns the identity of the conference s guest speaker, Iona realizes it may not be so trivial after all, and she must enter the dark world beneath the city to prevent a possible catastrophe."