The mysterious Circus--a circular street of thirty houses--in Bath, England, provides the hub for three intertwining stories about a contemporary girl with a terrible past, an eighteenth-century architect obsessed with druids, and a prehistoric king who learns to fly. Through three voices, mysteries are revealed linking Sulis, a teenage girl with a mysterious past, Zac, apprenticed to an architect obsessed with Druidic mysteries in 1740, and a druid king who discovers the healing waters of a magical spring.