Now that they've bought their dream home, Jenni and Elliott Hamilton just want to settle down and start a family. But their plans are derailed when they get sucked into the In Between and learn they belong to a race of people called the Gatekeepers, with the power to travel between worlds and realities. Navigationally challenged, they find themselves on an adventure they never asked for. If they can survive the killer rain, saber-tooth zebra cats, and a horrible penchant for accidentally gating into war zones, they might even find a way home. That'll only happen, though, if they can stay under the radar of the high council and convince the Underground to stop kidnapping them for secret missions...which would be a whole lot easier if the organization wasn't run by family.