My Super Psycho Sweet 16 Part 3: wo years after the events of the previous film, Skye Rotter, is moving out of her boyfriend, Brigg, and his familys house to New York City for college with her new friend, the free spirited Sienna, (Jillian Rose Reed), whom she met on craigslist. As she is on the road, Skye receives a call from her estranged sister, Alex Bell, who Skye has not spoken to since the past two years. Alex is surprised that Skye wasnt going to tell her that she was leaving. She begs Skye to come see her at her grandparents country house to say goodbye before she leaves. Initially, Skye refuses, but is convinced by Sienna to tie up all loose ends before moving on with her life.