As part of a desperate battle to save an imperiled 24th-century Earth, four teenagers from the planet’s past join forces on a mission to the edge of the solar system to a small scientific base overrun with cute but dangerous alien pests.
A homesick, 16 year-old Roman girl and her illegitimate child, are exiled by the Emperor Nero to Britannia. A middle-aged Celtic king of an insignificant tribe is trying to find middle ground between Celtic tradition and Roman rule and is making enemies on both sides. The shadow of martyred Queen Boudicca is like a curse on the land. An old Legionary is willing to give his life for a friend, and there's a former Greek slave with a secret past that rescues him.