As 72-year-old former police officer Joe DeAngelo's arrest unfolds in real time, chilling facts materialize that illuminate Michelle's prescience in her book's epilogue, "Letter to an Old Man." Researcher Paul Haynes and true crime writer Billy Jensen try to learn everything they can about DeAngelo. Exclusive interviews with DeAngelo's relatives reveal early family trauma, and his double life as a suburban dad and serial predator. His ex-fiancé also details the behavior and warning signs that lead her to end their engagement. Having finally faced their attacker in court, several survivors meet for the first time and gain strength in their shared desire to confront their pain, move forward, and advocate for all sexual assault survivors. When Patton Oswalt, Jensen, and Haynes connect with survivors and McNamara's fellow citizen detective Melanie Barbeau, Michelle's absence is deeply felt.