After the gruesome murder of their father, the Locke kids, Tyler, Kinsey and Bode move with their mother Nina to the ancestral family home, Keyhouse. They soon discover that the house is full of secrets when they start finding magical keys which hold impossible powers such as turning people into ghosts, or being able to erase someone's memories. They are not the only ones who know of the keys; a demonic creature known as Dodge is also after the keys, with the goal of opening the Black Door, which will allow the demons of hell to enter our world.