She works nights saving lives in a crowded city ER. He lives in the spaces between operations that officially never happened. Y/N is used to exhaustion, emergencies, and the weight of other people’s worst days. What she isn’t used to is the quiet stranger who helps her jump-start her broken car after a late shift and leaves without asking for anything in return. Elias Mercer is not a man who stays anywhere for long. A classified special operations asset known only by a codename, he exists in fragments — missions, disappearances, returns that never fully explain where he’s been. Attachment is a liability. Permanence is not part of the job. But something about Y/N doesn’t fit the rules he’s lived by. What begins as a chance encounter becomes a repeating pattern he never intended to form — brief returns, silent help, conversations that reveal nothing and somehow change everything. The more he steps into her ordinary world, the harder it becomes to step back out of it. Because in his line of work, connection isn’t just dangerous. It’s a breach. And someone is always watching for breaches.