Jesse's best friend is killed by a black truck and Jesse himself is injured in the accident. He can't ride a motorcycle again until a man named Norman Tuttle turns up and offers him a knee operation and a job as a test pilot for a top-secret government project, code named Street Hawk.
Jesse impedes a jewel sale, but a murderer, pretending to be a cop, retrieves the gems. This episodes introduces an enemy unknown to Street Hawk. This enemy is the masquerading cop boss whom we only know of via telephone conversations.
Unwittingly Jesse and Norman become embroiled in the case of Linda Martin, an important witness against a mobster. She is persued by the mobster's henchman who are hell-bent on getting rid of her.
A series of arson attacks at six different factories make Jesse and Norman doubt about their fortuity. Yet, when they set out to investigate, they are both completely baffled by the fact that the detonator responsible for each incident is untraceable.
The Widow of an overthrown dictator employs an escaped prisoner for a hideous scheme. Jesse investigates after the prisoner leaves a stand-in at the jail.
Jesse pursues a gang of gunrunners and their trail leads him to a laser weaponry. There Norman re-encounters an old flame, gets captured, and Jesse is left to do all work on his own.
Jesse helps an author solve a murder committed years earlier. The writer is about to release a book which supposedly incriminates those responsible, but only puts her in danger since the killers now need to get rid of her.
Altobelli comes to Jesse's aid when a Federal Agent tries to justify his failure to stop an assassination. However, the assassin is really seeking revenge against the fed who put her away years earlier. Watch out for the face to face confrontation between Altobelli and Jesse as Street Hawk.