A friend of Hammer's is kidnapped and held for ransom during a jewelry store robbery. Things go wrong during the handover of a valuable diamond and Hammer has a lot of work to do before he finally works out what is happening.

The secrets of a rich and powerful family are revealed when Hammer looks into the overdose death of a friend, a popular singer.

Hammer saves a woman in Central Park only to see her killed in front of him a short time later on her front door steps. When police aren't looking for the killer, Hammer realizes that the mystery is bigger than he thought.

A former detective suddenly shoots a man for no reason and forces Hammer to kill him. Hammer is determined to find out why, with the clues being a blonde and a marked dime. These clues lead him to a psychiatric clinic.

An old friend of Hammer's has her wallet stolen and he is mystified why she doesn't want to see the police. It turns that there are escorts, diplomats, blackmail and military intelligence all involved.

A friend of Hammer's, a fashion photographer is murdered after doing a fashion shoot. It takes Hammer and the police officer he is working with a long time to find a motive. There's betrayal and double-cross before the mystery is solved.