The game begins in 1923, after World War I veteran Patrick Galloway  receives an urgent letter from his friend Jeremiah Covenant. Covenant,  well aware of Galloway's reputation for dealing with occult matters, is  in failing health and raves about a curse that has destroyed his entire  family. Galloway travels to the Covenant estate on the coast of 
Ireland to visit his friend, who relates an outlandish tale of 
supernatural terrors.
 Jeremiah Covenant is one of five children, along with his siblings  Ambrose, Lizbeth, and twins Aaron and Bethany. As children, the  Covenants found a strange 
occult book in their father's library and performed a ritual found within at an ancient set of 
standing stones  located on an island on their family's extensive estate. This seemingly  childish game however, brought the wrath of evil forces upon the  family. After reaching adulthood, the Covenants fell one by one into  madness and then death, eventually leaving Jeremiah as the only  survivor. The power of the curse, however, has reanimated his fallen  brothers and sisters as monsters of pure evil; they have been haunting  Jeremiah and he fears that he will soon follow where they have gone.
 Galloway decides to honor his friend's wishes by trying to stop  whatever was set in motion long ago at the ancient stones where the  ritual was performed. Through the Covenants' journals and Galloway's own  memories, the player learns more about the nature of the curse and the  creature behind it: The Undying King, a powerful demonic presence  threatening to destroy the reality we inhabit.
 While attempting to prevent the Undying King from entering our world, Patrick must face off against the four 
undead Covenant siblings as well as Otto Keisinger, an evil rival who simply wants to gain power from the demonic forces.