Cal Jastrow and Danny Scott, two street toughs, break into a house and begin to loot it, but as they are making their escape, the owner returns and Danny shoots him. The shooting is witnessed by pretty Allison Baker and her boss-lover Neil Stoner as they are driving past. Danny's eyes meet Allison's as Stoner's Ferrari roars by. Danny knows he was seen and he and Cal leave quickly. Hooker and Romano are called to the shooting site and find the man dead. Across town, Allison and Neil quarrel. She wants to report what she saw to the police. Stoner insists she mustn't...he can't explain his being with her to his wife. But the choice is no longer hers when Hooker shows up to question her, after the neighborhood milkman who notified the police of the shooting identifies Allison. Meanwhile, Cal and Danny split up their take from the robbery. Cal wants out, but Danny threatens to take Cal down with him if he gets caught. Danny also plans to get rid of Allison before she can talk. Sensing she was lying, Hooker and Romano visit Allison at her apart-ment that evening where she tells them she's afraid to get involved. They are persistent, they need her help and Allison ends up identi-fying Danny in a line-up. Hooker has no case unless Allison will testify in a hearing. But later that evening Cal makes an attempt to kill Allison. Luckily, Hooker is nearby and scares him off, taking a bullet in his shoulder before Cal flees. Now Allison is more terrified than ever to be a witness and Hooker is unable to get police protection for her. Allison does testify however, but Danny's boss lies for him, providing an alibi, and Danny is set free. Allison now fears for her life. Hooker is scared too and knows he's responsible. So he arranges for Vicki to stay with her until he's off duty. Hooker visits Danny's boss, Vitale, to shake him for information. He finds Vitale beaten and left for dead by Danny, so he tells Hooker where to find Cal. Meanwhile, Danny has broken into Allison's apartment, knocked out Vicki and is about to kill Allison, but on Cal's confession, Hooker arrives in time to save her and captures Danny in the pro-cess.