Tristan Ravasco

11th Century AD. In a world that burns with the heat of battle, a world torn apart by Crusades, one knight traverses the desolate wastes laid bare by bloody conflict. Prepare yourself for a descent into a brutal hell, where armies clash and blood flows like rivers, and where a sharp blade is the only means of defense against an army of evil.

Clara takes her daughter and her friends to a weekend visit at her grandfather's village. They all have a great time, but after they return home people start dying. First Clara's grandfather mysteriously drowns, then the children start getting sick and one, her goddaughter, dies. Around same time clients at the spa she teaches aqua-aerobics start getting sick with one dying. She finds some mysterious algea, related to Caulerpa taxifolia, planted near where her grandfather supposedly drowned. Clara suspects the algea and all of these illnesses and deaths are related to some sort of poisonings of fish caught near her Grandfather's village.