A whole town is in fear because a masked man has been assaulting elderly women who live on their own. The assaults are becoming increasingly violent and everyone is afraid that the next one will be fatal. Unit One is called in and La Cour is forced into dealing with a painful encounter from his past. IP is having a hard time with Kirsten and receives a flattering invitation, while Fischer acquires insight into Johnny's love life. Part one of a two part episode. (thetvdb.com)