It’s twenty years later, and time travel has taken a toll. Hank, Audrey, and Sweeney have been threatened, blackmailed and kidnapped so many times they’ve lost count. The secret of time travel is too much to bear. They have finally tied up every loose end and rearranged time and space to do so. To finish the last task, and to protect Audrey’s last invention, the three need the help of a new generation of travelers.