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In the early 1900s, a strange sickness starts creeping through American factory towns. Young women lose teeth, jaws soften, bones collapse — and every doctor’s excuse dies the moment another girl walks in with the same symptoms.
Nothing fits.
And nobody wants to say what’s obvious.

Grace Fryer takes the job because it looks ordinary. The paint glows softly in the dark, the foremen insist the brushes stay sharp, and the fastest way to shape them is with your lips. That simple routine becomes the beginning of one of the most brutal medical mysteries of the century.