Discover one of the fiercest fighting Chapters in the Universe - the Ultramarines 4th Company! Sergeant Learchus must take twenty-five newly recruited Battle Brothers on their first engagement, as they embark on an investigation of the lost patrol ship, Guilliman's Honour. What was a routine mission becomes much more when 4th Company encounters one of the Imperium's deadliest enemies! Writer Graham McNeill and artist Kevin Hopgood embark on a new chapter in the Empire's Imperium's fight for supremacy! Features two alternate covers, both by Anthony Williams.