It`s Sierra Nicole`s birthday, and her "bestie", Piper Perri, has some big plans for their day! It`ll start with a surprise! A big one! "Where are we?!" Sierra says in disbelief, as petite Piper drags her into an adult bookstore! Once inside, Piper has plans: get Sierra back to the arcade, where the private video booths play dirty movies. Once inside, Piper, who`s been "really into girls" lately, jumps Sierra`s bones! But Piper has bigger plans. Much bigger.