Having prevented the ferocious Bloodfiends from bringing disaster to their homeworld of Baal, the Blood Angels go in search of the renegade who almost destroyed them - Fabius Bile. Tracking the Chaos traitor down to his secret base on Dynikas V, a world beset by alien tyranids, the Blood Angels find horrors more terrible than even they can imagine. And with a sample of primarch's blood in his possession, the Blood Angels must discover what nefarious plot Fabius Bile is bent on.

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James Swallow's Blood Angels story comes to a dramatic end, tying together plot threads from the three previous books and delivering a thrilling conclusion to the saga.