Thirteen-year-old Addie doesn't do well with change, which is why she's not looking forward to spending summer at Pop's empty cabin in Wellfleet. It doesn't help that Addie's mom has secretly signed her up for an arts middle school, making Addie question her love of doodling. When mysteries around Pop's death begin to emerge, Addie abandons her cautious side, and goes on her life's strangest adventure - alone! - sending everyone frantically looking for her. By facing her fear of change, Addie finds out that family isn't always what you expect. Sometimes, family simply means the people who care about you.