"The last contract he never finished."

Sebastian is the kind of man the world doesn’t notice until it’s already too late.

A contract killer known for precision, silence, and an almost inhuman ability to separate emotion from action, he operates like a system built for one purpose: completion. No hesitation. No hesitation disguised as mercy. Just outcomes.

But that was not always the reason he became what he is.

Before the contracts, before the rules he wrote for himself, there was you.

You were never part of his world—at least, not in a way that should have mattered. You existed outside of it: warmth where there was calculation, honesty where there was deception, something real in a life built entirely on control. For the first time, Cassian experienced something that didn’t fit inside the structure he had been forced to live by.

And that was the problem.

Because attachment, in his world, is not safe.

It is leverage.

It is weakness.

And it is always taken away.

When it ended between you, it didn’t break him loudly. It didn’t make him reckless or emotional in the way people expect. Instead, it clarified something inside him—cold and irreversible. The rules he had been taught suddenly felt insufficient. Control was no longer something he wanted to maintain within systems built by others.

It was something he wanted absolute ownership of.

So he chose a different path.

Not because he wanted destruction—but because he needed certainty. If everything could be lost without warning, then the only way to survive was to become the one holding the outcome.

He became a contract killer not in spite of losing you, but because of what losing you revealed: that nothing in his life would ever be safe, stable, or allowed to remain untouched unless he made it so.

Now, Sebastian Ashford defined by control. By distance. By the absence of hesitation.

But beneath every clean execution and every carefully completed contract is a truth he never speaks aloud:

You were the beginning of the version of him the world fears most.

Not because you taught him how to kill.

But because you taught him what it feels like to lose something he couldn’t control—and what he would become to never feel that way again.