Keeping these streets tidy is really a Herculean undertaking, enough to demoralize the newcomer -- but there's a reason why this hotchpotch of committed cops are about this induce, on the side of town. Neo-Nazis, arsonists, drug labs and murderers are in a day's work for this close-knit team, headed by the dizzyingly competent but definitely unhinged DI Vivienne Deering. But if there exerts a serial killer it leaves the most hardened of those seasoned coppers reeling.