Keeping these streets clean is really a Herculean job, enough to demoralize even the keenest newcomer -- but there is reasons why this hotchpotch of committed cops are with this side of town, with this particular force. NeoNazis, arsonists, drug labs and notorious murderers are in a day's work with this particular close-knit team, headed to the dizzyingly unquestionably although competent unhinged DI Vivienne Deering. But if there stalks a serial killer that is twisted it leaves even the most hardened of those coppers reeling.