On December 22, 1972, St. Louis high society was readying itself for The Veiled Prophet Ball—a debutante ball for the daughters of the city’s most pedigreed families. Inside, thousands of guests at the white tie event settled in for an elegant evening. But just outside, a group of stealth activists was preparing to infiltrate the exclusive party, where they’d attempt to pull off a dramatic stunt and unveil the ugly truth behind the ball’s origins.