Chapter One: Let the Bodies Hit the Floor

She's not on the roster. She's not in the system. She's not even supposed to be alive.

Every mission the Thunderbolts run, she's there-appearing out of nowhere, tearing through enemies like a storm, then vanishing without a trace. One time? Coincidence. Two? Bad timing. But three, four, five? She's not a ghost... she's something else entirely.

They don't know her name.
They don't know what side she's on.
But they're starting to realize something terrifying:

Their missions don't succeed unless she's there.