Harper Wells finally gets a bedroom of her own, away from her annoying big brother. But on the first night in her new bed, she wakes up in the past and meets a troubled young girl named Edie. Has befriending Edie changed the course of Australia's history? Who does this strange time-travelling bed really belong to? And what will happen when the rightful owner discovers Harper using it? Harper is thrown into a world of time-travelling spies as she risks her life to find a missing girl before time runs out.