Cressida Hoth is alone in the world. Orphaned and unwanted, she is inflicted with a peculiar curse by her mischievous aunts and banished to a finishing school in the secluded kingdom of Dernmont. Students train in every accomplishment suitable for young ladies: music, dancing, etiquette...and strangely, poison-making, fencing, and lock-picking.

The school is a front for a rebel spy ring, and when her training is complete, Cressida is selected to join a mission to infiltrate the kingdom's royal court. She has been thrown unceremoniously into a world of ball gowns and espionage, but she is still under a curse, and it threatens to expose them all.

Defending her teammates and her secret, Cressida discovers that the kingdom's buried history and the truth behind her curse run far deeper than she imagined.