When Officer Jessie Mach is crippled after an assault by an old enemy, his time on motorcycle field duty seems finished. That is before Norman Tuttle recruits him for a secret government project. Mach is to be the test pilot for the Street Hawk, an advanced motorcycle that carries tremendous firepower and is capable of safely controlled periods of speed of over 300 MPH in an urban environment. This deal includes special surgery to repair his legs while keeping him the facade that he is still handicapped. Unfortunately for Tuttle, who can monitor the action from mission control, Jessie insists on getting involved in stopping crime rather than the simple tests Tuttle wants. So now the city has the additional protection of the mysterious superhero known as Street Hawk.