When Scotland Yard suspects corruption on the patch of DCI Tony Clark, the ambitious detective, finds himself assigned the unenviable task of investigating his own station. His first target is a ring of officers who are taking kickbacks from laundered drugs money.

When a youth is shot by armed police, years of resentment are set to explode into violence, but the wrath of Chief Supt Jameson is even more destructive.

Tony Clark's marriage begins to fall apart as he investigates a complaint of sexual harrassment by a WPC against a black sergeant.

When DCI Tony Clark follows up an allegation of police brutality after an old man claims to have seen a prostitute attacked, an influential officer obstructs his inquiry. With the whiff of promotion in the air, Clark is determined to get to the facts, whatever the cost.

Sgt Maureen Connell needs all the help she can get after her cover is blown while investigating a hostile police station. DCI Tony Clarke, caught up in murder case, has other things on his mind.

After a brutal armed robber is released, DCI Tony Clark investigates the officer accused of bending the rules to obtain his conviction.