Reluctantly agreeing to a joint investigation alongside a detective from the Drug Squad, DI Nathaniel Caslin is perplexed by the multiple homicides of a number of addicts. Poisoned by their own supply with no apparent motive, the killings appear gang related. The crime scene is filthy and forbidding with each victim having the index finger removed from their right hand after death. A planned mutilation? A trophy? Strategically placed among the dead is a blooming pink flower, the only beauty within a dark, macabre scene.