Docuseries about the rise and fall of provocative French serial killer expert Stéphane Bourgoin, who built an international reputation for his extraordinary resume, personality traits, and morbid encounters. After citing a violent and gruesome story as the motivation for his relentless quest to understand the minds of killers, Bourgoin becomes the target of a group of online sleuths attempting to untangle his web of lies and uncover the truth. The series reveals their dogged investigation and the shocking extent of Bourgoin’s deception spanning more than 30 years.