I was in the kitchen helping my mother plate the appetizers when the heavy thud shook the floorboards above the living room ceiling.

Then came the scream. It wasn’t a normal childhood wail. It was a high, thin, tearing sound of pure, unadulterated agony.

I dropped the serving tray. The porcelain shattered against the tile floor, but I didn’t care. I sprinted out of the kitchen and into the sunken living room.

My eight-year-old son, Leo, lay curled in a tight fetal position on the expensive Persian rug. His small chest was hitching with rapid, shallow, agonizing breaths. His face, usually flushed and vibrant, was the color of wet ash. His eyes were wide with a terror that ripped the air straight out of my own lungs.

“Mom… mom, it hurts,” Leo wheezed, tears leaking silently from his eyes, too focused on drawing his next breath to actually cry.

I dropped to my knees beside him, my hands hovering over his tiny, fragile body, terrified to touch him. “Where, baby? Where does it hurt?”

He couldn’t speak. He just whimpered, a broken, desperate sound, and twitched his right shoulder.