When ruthlessly dedicated postal inspector investigates the murder of a co-worker, he finds that the sole witness, a nun, has been targeted by the killers.When ruthlessly dedicated postal inspector investigates the murder of a co-worker, he finds that the sole witness, a nun, has been targeted by the killers.When ruthlessly dedicated postal inspector investigates the murder of a co-worker, he finds that the sole witness, a nun, has been targeted by the killers.