Having left Nazi-occupied Vienna a year ago, thirteen-year-old Jewish refugee Stephie Steiner adapts to life in the cultured Swedish city of Gothenburg, where she attends school, falls in love, and worries about her parents who were not allowed to emigrate.

Safely back in 1803 England, Merlin's Irregulars are more confident, proud, and powerful, but class distinctions complicate their relationships until the mages are called upon to rescue a vitally important French scientist and his family from Nazi-occupied France.