In 2015, Ambra Gutierrez agreed to do something that terrified her. A day after she told police that Harvey Weinstein had assaulted her, she decided to participate in a sting operation designed to extract a confession from the Hollywood executive. But those hours of dodging and weaving to escape Weinstein’s advances—and the threat he'd discover the wire she was wearing—would turn out to be just the beginning of a multi-year saga that pitted Gutierrez against powerful interests in Hollywood and law enforcement that seemed to want her evidence buried.