Eighteen-year-old Angélique dreams of designing opulent gowns for society's elite, but her reality is a life spent dyeing silk in a sweatshop. That is, until tragedy strikes, leaving her orphaned and responsible for her younger sister.

Determined to elevate their station, Angélique secures a position as a junior dressmaker for Paris's top modiste. Though she's tormented by other seamstresses for being poor, and her meager salary barely pays rent, she refuses to give in.

When a high-stakes contest for a coveted protégée role is announced, Angélique will do whatever is necessary to win--even if it means resorting to deadly measures. What's a little arsenic between coworkers?

As Angélique outshines--and outlives--the competition, her newfound privilege and power are weaponized against those who destroyed her family. Will she conquer the world of high fashion to claim her rightful place as Paris's best designer, or will the cost of ambition be too high?