When Vanessa Bevins is found murdered outside of the club she worked at, it is up to Detective Stabler to notify her father. With the evidence that a rape occurred, they start the investigation looking for Vanessa's killer. What they find was that she was in fact raped, but it occurred two weeks prior to her death. Her death was ultimately ruled a suicide, but her father still wants the man who raped her to be held responsible for her death, because he is the reason she pulled the trigger. And when the Special Victims Unit are unable to help him, he takes matters into his own hands.
This was a good episode. You could see that Detective Stabler was getting close to the case, because he would have felt the same way that Ray Bevins did if it was one of his daughters who was hurt. On one hand I understand that Ray should be held accountable for his actions, but at the same time I can understand why he would feel like it was his responsibility to take matters into his own hands.