This book opens in a small town in Michigan where Sarah Cole and her sister, Lacey, are now living with their aunt and uncle. Still reeling from the fact her parents have disappeared, Sarah starts the school year with her new friend Jackie Jenkins. When Sarah learns the school has been bombed, she’s filled with dread. Uncle Walt is a teacher, and he was in the school when the bomb exploded. Taking matters into her own hands, Sarah decides to search for him. The rest of the Super Spies are right behind her.