Citizens of a dilapidated coastal city, fear the dark specters that infest their waters— the Streyga. Controlled by the witch Macosta, the Streyga violently prey on anyone who ventures off shore. Byron Speck, a young guardsman, finds himself entangled in a bewitched battle for power, unsure of who he can trust. With a whole city turned against him, he must decide who is worth saving— the city or himself.