At the height of the Webway War, renowned Mechanicum technoarchaeologist Arkhan Land ventured into that alien labyrinth in defence of the Imperium. At his side was a wounded warrior of the Blood Angels, Zephon. Now, Land faces a great challenge – to repair the damage done to Zephon, partly as a result of the tech-priest's own tinkering. But how can Land succeed where the greatest of Apothecaries have failed? And when all is done, will the only person the tech-priest comes close to calling friend still be the same man?