Polly O'Keefe has recently moved in with her grandparents, the famous scientists Alex and Kate Murray, when she wanders into a time 3,000 years before her own. Perhaps it's not an accident--as she is told by two druids. When a gate between circles of time opens, it opens for a reason. When the gate closes behind Polly and her gravely ill friend Zachary, the reason becomes clear.
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