When the Stephenson family travel to a grand country house on the Devon coast for Kat's sister Angeline's wedding, Kat is stalked by a dangerous magical enemy and finds everything she thought she knew about her late mother called into question. With smugglers, sabotage, tangled romance and plenty of magic activity at work, it's the job of Regency England's feistiest twelve year old to protect herself and her family from impending ruin.