When pretty blonde Patsy Grady is found dead in the passenger seat of her husband's car, the squad initially can't figure out any possible reason why someone would kill the young woman, but as they investigate the case, the squad realises that Patsy was not only unfaithful to her husband, the paternity of her child was in question. This leads them to playboy Malcolm Harding, who is quick to point out that he has no reason to kill Patsy because he had a vasectomy. Meanwhile, Pogue and Oosterhuis investigate when Carolyn reports that there has been a man calling her and making obscene threats for the last few weeks. Oosterhuis tries to convince Pogue to back off, but he's determined to fix the problem, even if it means spending more time than he should with Carolyn.