Bullets, Banter, and Ghosts

Living a double life is second nature to Mason Thorne. To the public (and the Earth's Mightiest Heroes) he's simply the brilliant, dry-witted young medic Tony Stark hired to patch up the Avengers after their chaotic missions. To Tony, he's the secretly adopted son rescued from a traumatic past, finally carving out a quiet, normal life.

For years, the arrangement works seamlessly. During the devastating battle against Ultron in Sokovia, Mason's quick instincts and surgical precision lead to a miraculous, split-second save that changes everything. In the aftermath, a foundation of deep respect and sharp-tongued banter builds between the weary medic and the speedster.

As Pietro recovers, their instant friction turns into an unwavering friendship. Yet as the stakes grow higher and the shadows of Mason's gift threaten to spill into the light, he finds himself navigating an entirely new danger: the terrifying realization that his heart might be just as vulnerable as the heroes he saves.