A Trace of Memory by Keith Laumer

He awoke and lay for a moment looking up at a low ceiling, dimly visible in a faint red glow, feeling the hard mat under his back. He turned his head, saw a wall and a panel on which a red indicator light glared.

He swung his legs over the side of the narrow couch and sat up. The room was small, grey-painted, unadorned. Pain throbbed in his forearm. He shook back the loose sleeve of the strange purple garment, saw a pattern of tiny punctures in the skin. He recognized the mark of a feeding Hunter…. Who would have dared?

A dark shape on the floor caught his eye. He slid from the couch, knelt by the still body of a man in a purple tunic stained black with blood. Gently he rolled the body onto its back.

Ammaerln!