Beneath the fog of San Francisco lies a hidden world of ghosts frozen in time. Bound to the limits of the city by the bay, and unable to move on to the hereafter, are the souls of Jack and Lilith, two siblings who lost their earthly lives in the Great Earthquake of 1906. Now, after a century in the shadows, Jack and Lilith's world is rocked again as barrier between the spirit world and the living world begins to unravel. With the help of Charlie, the one living child who can see them, they must fight to save their city and their souls from a force so dark it can only be seen at night.