The Special Victims Unit is called in to investigate the disappearance of a teenage prodigy (Mallory Bechtel) during a spring break trip. The prime suspect is a butcher (Eric Tabach) who was seen leaving a club in a clown mask with the girl and she was last known to have been at his apartment. However, the case becomes extremely difficult to close. When the detectives try to find her body at a dump, they find that the dump has been emptied. Stone tries to get justice for the girl and lock up the butcher as the chances of the girl being alive become extremely slim. However, towards the end, the case takes a shocking twist and the detectives discover that the real culprit is someone they least suspected. Stone reveals to Benson and star that he moved to New York to take care of his sister who is mentally ill in a home upstate. and star told peter that she will do a night with out him if he was to see his sister and he thanks her kiss her bye Stone then goes to see his sister at the facility and she mistakes him for their father and he has to tell her that he is her brother.