From publisher blurb:
Hearts of Darkness
Welcome to Daggerport, city of thieves, pirates and renegades. After a brawl, the players join an expedition bound for a mysterious old tower. Somewhere in that tower is said to lie the Ruby Heart, a gemstone of inestimable value. As they sail down the storm-battered coast, the players will face a primordial predator that baits its prey before crawling out of its briny cave to feed. But in the tower, their greatest test will not be one of spells and steel, but a test of conscience that may expose conflicting motives in the party. The Ruby Heart asks much of what lies in the hearts of those who seek it.
Tower of the Vampire is the first of the Legends of Gildor, a series of sword and sorcery fantasy adventures featuring characters driven by duty, vengeance, fealty, curiosity or simple greed. Harkening back to the character-centric tradition of Howard, Leiber, Moorcock and Wagner, the Legends of Gildor put a unique emphasis on the player and non-player characters, their decisions, and the sometimes-tragic consequences of their actions. Six pre-generated characters are included with the adventure.