Fate's Masters, Destiny's Servants

Ultramarines Captain Elogos follows a strange distress signal that seems to have been sent by a member of his Chapter. Tracking it to a distant world that no Ultramarines have ever visited, he finds a primitive fortress that bears all the hallmarks of the Adeptus Astartes. As they unravel the secret of the world, Elogos and his men realise that their destiny may lie on Elysius.