It's 1934 and St. Paul is a haven for gangsters, criminals and other ne'er-do-wells. It's also the temporary home of Marcos Darby, a time traveler from the twenty-third century who's overstayed his welcome in the past.

Will Taupert is a Guide with the History Patrol, sent with his telepathic companion Theo to bring Darby back to the future. Will and Theo have been on many time trips together, but this one seems different, familiar, and Will starts to wonder if he's been here before.

For Theo, this trip is her one chance to earn Will's forgiveness for wrongs in a former lifetime. Now history is repeating itself and she can't do anything but watch as Will is forced to make a fateful decision, one that could grant Theo forgiveness or end her life.