In 2001, seventh-grader Rylee Wilson and new student Joe, whose father was a New York City first responder on 9/11, decide to find Zachary Beaver and reunite him with Rylee's father, Toby.

Ten-year-old Piper moves yet again when her father, who is a Chief Petty Officer in the Navy, gets assigned to Norfolk, Virginia, and although the move takes a bit of adjustment, she soon makes friends with the girl next door and catches up with old friends too.

Piper is sad about leaving her home and friends behind when her father, a Navy aircraft mechanic, is transferred yet again, but with help from her often-annoying sisters and a surprise from their parents, she finds happiness in their new home in Pensacola, Florida.

Fifth-grader Piper and her sisters are thrilled about their first-ever camping trip until they learn it will be at Halloween, but other Navy families join them, including an annoying new member of the Gypsy Club.

When she discovers the price of the coveted clubhouse, ten-year-old Piper and her fellow Gypsy Club members try to earn the money by creating a birthday-party-planning business.