From publisher blurb:
Level-5 D&D 5e + Shadowdark Adventure
In Thick Blood, the heroes must face a blood-thirsty group of cultist gnolls. The people of Oaken Valley are being kidnapped and abducted from their very homes to be used as fuel for the cult's incantations. The evil gnolls venerate the ancient Pale Blood god, an obscure and elusive deity. Their blood rituals have not only become a threat to the small towns; they affect Lysander's Reach, the capital. The authorities need to deal with these abominate gnolls at once.
This is an adventure that requires the heroes to gather their strength, call all their allies, and delve into the lair of evil gnolls. They must spear through the cult's ranks and maintain their morale against their blood magic. If they succeed, they will not only save the lives of many, but the allies made along the way might become their new friends and companions for adventures to come!