In a small town in Virginia, a group of people know each other because they’re part of a special treatment center, a hyperbaric chamber that may cure a range of conditions from infertility to autism. But then the chamber explodes, two people die, and it’s clear the explosion wasn’t an accident. A powerful showdown unfolds as the story moves across characters who are all maybe keeping secrets, hiding betrayals. Chapter by chapter, we shift alliances and gather evidence: Was it the careless mother of a patient? Was it the owners, hoping to cash in on a big insurance payment and send their daughter to college? Could it have been a protester, trying to prove the treatment isn’t safe?