Detectives Briscoe and Curtis investigate the death of Karen Marsh who, it seems, jumped off the Brooklyn Bridge. They soon establish that she had been in a fender bender and the driver of the other car forced her out of her car and chased her. She apparently leaped off the bridge to get away from him. Karen had been without a job since the shoe factory she worked in burned down some six months before. She had recently visited her old boss, Harold Dorning and he thought she was just fine. They eventually trace her attacker, "Crazy" Mike McDugan a man with a violent temper and a criminal record for assault. He admits to the road rage incident but insists that she jumped off the bridge on her own. The best the DA's office can get is an indictment for assault - until they learn that his one-time prison roommate was a professional arsonist which makes them look into the fire at the factory where she worked and her old boss.
—garykmcd