Allie's excited about her class field trip. She gets to ride on a bus, which she never gets to do, living so close to school that she actually has to walk there every day! But then Mrs. Hunter announces that every student in Room 209 has been assigned a "buddy" for the day - from Allie's old 4th grade class at Pine Heights Elementary - and her buddy just happens to be her ex-best friend Mary Kay, who betrayed Allie right before she moved! This is one field trip Allie's definitely going to need to need to write some major rules for.