Leo Valdez fixes things. It's what he does—gears grinding, metal sparking, his hands knowing secrets his mind can't quite grasp. But lately, when he looks at the blueprints scattered across Cabin Nine's floor, his fingers itch for something he can't name, a warmth that isn't fire-resistant cloth or engine heat. The Argo II rises around him, magnificent and impossible, yet every weld feels like filling a hole that keeps growing deeper.