The episode begins with two scared girls running into a rave party and away from something. As they run through the crowd, one of the girls loses her scandal and bends down to search for it. The other girl tries to pull her away but just then she looks awestruck when she sees the man (wearing a hood and face not shown) at a distance. The assailant fires shots at them. The next day, the team is at the scene. Sarah and Russell are trying to handle their long distance relationships. Detective Moreno is also at the scene. David is examining the body of one of the girls who was shot. There are four to five rounds fired and a single shot on the back and the exit wound on the chest. ..