Warhammer 40k - Horus Heresy Short Story - Grey Angel by John French

THE STORY
On a distant world of the Imperium, an agent of Rogal Dorn finds himself the prisoner of a Legion whose loyalties may be divided. Shackled and bound, the former Luna Wolf must fight a battle of wits with his captor, lest the course of the Horus Heresy take an unexpected turn. Will his very presence drive his erstwhile allies into the arms of the Warmaster or will maintaining the status quo prevent another Legion from turning traitor? And just who is the mysterious Space Marine aiding him from the shadows?

Written by John French.

On a distant world of the Imperium, an agent of Rogal Dorn finds himself the prisoner of a Legion whose loyalties may be divided.

READ IT BECAUSE
Two loyal warriors from a Legion that's turned its back on the Imperium investigate the home world of another Legion that could go both ways...