Tiffany Dover was one of the first Americans to get the COVID vaccine—and she got it live on camera, at the hospital in Chattanooga, Tennessee, where she works as a nurse. “I'm sorry, I'm feeling really dizzy. I'm sorry,” Dover said while taking questions afterward. Then she fainted. Twenty minutes later, Dover was back in front of the camera. “I feel fine now,” she said. And she was totally fine. But thousands of people online had already made up their minds: Tiffany Dover was dead. And they were going to prove it.

The story of Tiffany Dover begins, ironically, in a moment of hope. The COVID vaccine is finally arriving in communities across America. Tiffany, the head nurse in her hospital’s COVID unit, proudly gets the shot, and then faints while taking questions about it. As she falls into the arms of the doctors standing behind her, the local news cameras turn away. By the time she returns to the podium 20 minutes later, a new conspiracy theory has been hatched: Tiffany Dover had died and been replaced by a body double. Brandy Zadrozny sets out to trace how the theory started, and to find the people who are keeping it going—those who truly believe that vaccines kill, and those who are just addicted to the game.

Brandy’s attempts to get in touch with Tiffany Dover are yielding only silence. So she heads to Chattanooga to prove that she’s alive—or at least, not dead. After stakeouts at Tiffany’s house and workplace don’t pan out, Brandy searches everywhere for records: the police department, the Office of Vital Records, grave registries. Nothing. Brandy meets with the local TV reporter who covered the vaccination event, and who got caught up in the conspiracy theory herself, and she questions a hospital official about CHI Memorial’s handling of the incident. Meanwhile, the theory is rolling right along, spreading more lies, and dragging in new victims.