Investigating the silence of a distant star fort, the Imperial Fists are attacked by the monstrous tyranids. With their ship in danger, the Space Marines enact a dangerous boarding action into the heart of the xenos bioship, seeking to rip the heart from the aliens and save the world below.
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Usually, its hordes of tyranids that invade humanity's Space Hulks - well now the tables have tuned. It's Space Marine against xenos monster in the depths of space - will the Imperial Fists succeed in their mission to destroy the hive ship, or have they just volunteered themselves as appetiser for the forthcoming invasion?
