|Moose lives with his family on Alcatraz because his dad is one of the prison guards. His sister, Natalie, has some mental problems that her mom is not willing to accept. He also meets some new people like Piper, Jimmy, and Theresa. He has to baby sit Natalie everyday which interferes with him getting friends, and Piper is getting him in trouble by doing things like including him in a scheme to have people pay to have their shirts washed by Al Capone. Another problem is that his mom is working very hard to get Natalie into a school for kids even though she is really 16. His problems increase when he goes into the prisoners section of the island to look for a baseball, and loses Natalie. He finds her talking to a prisoner and wonders if she did anything else with the prisoner. He doesn't know how to figure out what happened but tries very hard to make sure his parents don't find out. This is hard because Natalie repeats the prisoner's number consistently.