A dismembered corpse floats in the canal in Little Venice, an upmarket tourist haven in London. The identity is unknown, but what is the significance?

DCI Isaac Cook is baffled as to why it’s there. Is it gang-related, or is it something more?

Whatever the reason, it’s clearly a warning, and Isaac and his team are sure it’s not the last body that they’ll have to deal with.

With time, the pieces are put together, ensuring those in the senior hierarchy of the drug syndicate are either dead or in prison.