In the 1970s, Paris fashion exploded like a champagne bottle left out in the sun. Amid sequins and longing, celebrities and aspirants flocked to the heart of chic, and Paris became a hothouse of revelry, intrigue, and searing ambition. At the center of it all were fashion's most beloved luminaries—Yves Saint Laurent, the reclusive enfant terrible, and Karl Lagerfeld, the flamboyant freelancer with a talent for reinvention—and they divided Paris into two fabulous halves. Their enduring rivalry is chronicled in this dazzling exposé of an era: of social ambitions, shared obsessions, and the mesmerizing quest for beauty.