Kassidy Stump is Patrick Stump's sister. She runs away and is stolen by a guy named Luke. He takes her to a place like sex jail and she is locked there for thirteen years. Pete finds her and feels attached to her. She dates different people for a little while then breaks up with them for being douches. She then helps Pete so he can be back together with Meagan. On the way there Pete gets kidnapped. Meagan and Kass get out to kick butt and kill. Kass gets back together with the Kellin Quinn. Pete still does not like him but Kass is head over heels for him. She moves on from Kellin and dates a boy named Jack. Together their one. Pete still can't say yes to her growing up. Find out why in dis book!