An eleven-year-old Texan girl finds out what it was like to live in the Ice Age in this action-packed time-travel adventure. As Esther participates in an archaeological dig in Texas, she is accidentally transported back in time. Living among the Clovis, the mammoth hunters, she learns of a very different childhood in which play is practice for survival and humans are prey for megafauna-scimitar cats, giant bears, and others. Will she ever get back to her own time?