Thread Tension.

A sweatshop somewhere in England, 1987. Management is desperate to dispel the mysterious phenomenon spreading among the seamstresses: full-body possessions. When a failed attempt to cover up a vulnerable coworker's fits leaves would-be agitator Maggie unemployed, she must choose between swallowing her pride or taking a stand, until she realizes what's been occurring isn't mass hysteria-it's a strike.