A policeman known to Ironside for some years is shot dead whilst on an investigation. The evidence points to him being crooked, but the Chief is determined to prove otherwise.

A policeman friend of Ironside and the team is the prime suspect in a murder investigation. Is he really guilty, though, or is the evidence just a little too damning?

When Mark is shot, everybody assumes that the hitman was aiming for Ironside. It soon transpires, however, that Mark was the intended victim. With no apparent motive, and no clues as to who hired the assassin, can the team find the people responsible before they find out that Mark is still alive?