Eighteen of the world’s most celebrated doctors filled a nursery more lavish than most people’s homes, their white coats flashing beneath chandeliers while machines shrieked and ventilators hissed. Specialists from Johns Hopkins argued with experts flown in from Geneva.

A Nobel Prize-winning pediatric immunologist wiped sweat from his forehead and whispered the words no one wanted spoken aloud.

“We’re losing him.”

Baby Oliver Kensington, heir to a forty-billion-dollar fortune, was dying, and all the expertise money could buy could not explain why his skin had turned the color of twilight. His lips were blue. His fingertips were blue. A strange blotchy rash spread across his chest like a warning no one could read. Every test came back uncertain. Every treatment failed.

Outside the nursery window, with his face pressed against glass he knew had never been polished for boys like him, stood fourteen-year-old Marcus Carter, the son of the night-shift housekeeper. His coat was too thin for the season. His shoes were worn nearly through. He had spent his whole life at the edge of that estate, moving quietly enough to avoid notice, seeing everything because no one ever bothered to see him.