Somewhere high above Washington, DC, a helicopter cut through the sky and descended onto the rooftop of a world-class medical laboratory.
The sound of the blades echoed across the concrete helipad as the aircraft settled, powerful and precise, like it belonged there.
Cassie's heart was pounding even before the doors opened.
Nathaniel reached for her hand the moment the engine quieted down, his grip firm and grounding. "We're here," he said, his voice calm but clearly pleased. "Are you excited?"
Cassie laughed breathlessly as she laced her fingers with his. "Excited?" Her eyes shone. "This might be the best day of my life."
And she meant it.
The moment they stepped off the helicopter, security personnel straightened instantly, greeting Nathaniel with sharp nods and unmis
