Mike learns that a young boxer's recent fights have been fixed by a mobster, and that he is expected to throw the next fight. The boxer asks Mike to help him by photographing the men involved.

Mike is forced by two masked men to take a photo of a man just as he is being killed. The police ask Mike to let them spread the word that he can identify the killers. His father convinces him to do this, but this puts both father and son in danger.

Mike is taken hostage after a bank holdup in which the owner is killed. The egotistical young robber and killer falls for Mike's suggestion that he take photos of him and send them to the newspapers to build up his image. Mike tries to provide clues to the robbers' plans in the photos.

Kovac takes a crowd shot at a fire scene, inadvertently recording the daughter of an aged mobster, hiding out in a tough neighborhood. The old man is being protected by a gang of young hoods, or so he thinks.

Mike takes pictures of a crooked gambler. Later he also takes pictures of the gubernatorial candidate who vows to put the gambler out of business if elected. But then his negatives are stolen and used to create a composite to make the candidate look like he is working for the gambling syndicate.

Mike Kovac takes a picture of a woman and learns later that the woman has been reported murdered. Mike decides to learn the real identity of the murdered woman.