Jack Williams was the best friend of Vietnam veteran and detective Mike Hammer. When Jack is murdered, Mike makes it his business to solve the crime. He is helped by his secretary Velda, and partly helped, partly hindered by the Chief of Police, Pat Chambers. On the trail of the killer, Mike discovers government conspiracies, and plots used by the CIA and the Mafia.

An ex New York cop is desperate to find his kidnapped daughter.

In New York, armed men hijack a subway car and demand a ransom for the passengers. Even if it's paid, how could they get away?