Doctor Renny stood by the glass pane outside Michael Helwart’s office, his brows knitted in confusion. Something about the situation didn’t add up. Michael had undergone a physical not long ago, clean as a whistle, healthier than most men in their thirties, with nothing in the report that hinted at an issue.

So why had Linsy pulled him aside in the corridor with panic in her eyes and frustration in her tone? She’d barely said much, just enough to make his heart race with a ...