His body collapsed against hers with a weight that made her stumble.

“Isaac?” Isabel’s voice cracked as she clutched his arms, trying to steady him, but he didn’t respond. His breathing was slow, heavy, and shallow, his face pressed faintly into the curve of her shoulder.

She wrapped her arms around his waist tighter, barely keeping him upright.

“Lena,” she shouted, panic rising thick in her throat, “somebody help—please!”

Her heart pounded. Everything was ...