Darkwater is about a 15 year old boy named Tom, his dead and ghostly brother Simon, and Sarah. Sarah and Tom were born about 100 years apart, but are both drawn to Darkwater Hall by a man named Azrael. Sarah's family used to be the wealthy owners of Darkwater Hall until her grandfather gambled all of their possessions away to Azrael. Living in poverty, Sarah makes a bargin with Azrael. She trades her soul for 100 years and an ample amount of money to right the wrongs that her ancestors have done to the people living around Darkwater Hall.