Harry Campbell had never feared hospitals. As a manager at a local logistics company and a father to two spirited twelve-year-old boys, he’d spent more than his fair share of time patching up scrapes, waiting through fevers, and sitting beside ER beds for the occasional broken bone. But nothing could have prepared him for the quiet dread that had been building over the past few weeks. It started with Josh—one of the twins—looking paler than usual.

He was always the more active of the two, but now he was napping more, skipping meals, and complaining about headaches. At first, Harry and his wife, Nancy, assumed it was just a growth spurt or maybe too many late nights playing video games. But when Josh fainted during P.E. class at school, panic finally kicked in. That’s how Harry found himself sitting across from Dr. Dennison in a stark white room at the children’s hospital, clutching his son’s medical chart with one hand and rubbing his forehead with the other. Josh and Andrew, his twins, were outside the door, playing a mobile game and laughing like everything was fine.