The body of a young City lawyer is discovered on an East London building site, assaulted and brutally murdered. Initial enquiries lead DI Simon Fenchurch to a driver employed by Travis, a controversial new app-based cab company. Within days another woman--a Travis driver--is found murdered. As the body count goes up, DI Fenchurch and his colleagues on the East London Major Investigation Team delve into the crimes and unveil a murky conspiracy that...