Harper has been gaining headaches, that then sometimes turn into migraines. But when a family of four moves in next door, Harper's mom gets excited and invites them over. Harper is forced to meet them all. She hangs out with their youngest Will, who was about a year older than Harper. Harper usually doesn't hang out with people because she gets headaches, but no headache comes to bother her until Will and the rest of the family leave. What could this mean?