The Killing Antidote didn’t save the monster.

She stopped on the landing.

She pocketed the booster.

“This is what normal people feel,” she whispered.

The Killing Antidote wasn’t a cure for death. It was a cure for the ability to kill. Developed after the Decade of Blood, when professional slayers like Lena had privatized war, the Antidote rewired the amygdala. It restored natural aversion to violence. It made murder feel, for the first time, like what it was.

The face of the man in Cairo—his last word wasn’t a curse or a plea. It was a name. Yasmin. His daughter. Lena had read about the funeral three days later. A small grave. A single shoe left on the dirt.

It was unbearable.

Lena traced the scar on her ribs—a memento from Cairo, from a man she’d strangled with a fiber optic cable. For five years, that memory had tasted like victory: clean, sharp, deserved. Now, looking at it, she felt something warm and unwelcome coil in her stomach.