It’s open season on time travelers! Dr. Serendipity Brown, Sherman and Dr. Wendell Howe must flee from the 24th century to hide in the past from 27th century terrorists. The fanatics have a time machine and a vendetta against all time travelers—especially the woman who invented the technology. But first Serendipity is determined to save five temporal anthropologists stranded throughout history. Can she and her companions find them before the assassins do?