In an enigmatic ancient realm teeming with dinosaurs and other long-lost species, individuals from various eras of human history have been brought back to life. Among them is Helena Walker, a paleontologist from 21st century Australia, who finds herself in this world following a disaster. To stay alive, she must adapt, forge new alliances, and evade merciless warlords, all while seeking to unravel the mysteries of this bizarre new environment.