A sweatshop, 1987. Management is desperate to dispel the mysterious phenomenon spreading amongst the seamstresses: full-body possessions. Instead, the oppressive environment puts three women on a collision course: Maggie, a would-be agitator; Wanda, a respected worker trying to get by; and Judy, a meek girl susceptible to the unearthly forces. When a failed attempt to cover-up Judy's fits leaves Maggie unemployed, she swallows her pride to get her job back but is rebuffed by the Foreman. Suddenly, Wanda falls. Then Judy, another, the next. Caught in the frenzy, Maggie realises what she's witnessing isn't mass hysteria—it's a strike.