With the sudden reappearance of a ghost from her past, Ellie is certain she'll finally get the answers to which she's been looking for so long. How is time travel possible? Do her regenerative abilities have something to do with the time travel? Will they be able to take Thomas home now?

Finally getting answers about the time travel and regeneration, Ellie finds there are only more questions, questions to which she cannot get a straight answer. When she has to travel back to Tombstone, Arizona, Ellie finds the mysterious Brett Hobbs to be a bigger surprise than she ever expected. When he refuses to help her, Ellie may be stuck in the past, yet again. How will she convince him to help her?

If Ellie can get what she needs from the Wild West, she can finally get Thomas home. But that means facing the impossible choice between staying with him or returning to her own time. It's a choice Thomas has to make as much as she does. After having reconciled with her family, how will she choose between them and Thomas? How will Thomas make the impossible decision of choosing between Ellie and his own time, his own family? How much knowledge can he cram in before it is time to return?

*This is the seventh volume in an eight-book series. It must be read in order.