On the nighttime streets of San Francisco, two sibling spirits, Jack and Lilith, have lingered since they became ghosts in the aftermath of the great 1906 earthquake. Bound to the limits of the city by the bay, and unable to move on to the hereafter, the two siblings live an unusual afterlife together as the city continues to grow and change around them. Until the safety of their world shifts and dark spirits begin to plague the city. Spirits start disappearing as a creature emerges bent on destroying the barrier between spirit world and the living. With his sinister spirit force, the creature sets into motion the makings of another disaster from which it seems Jack and Lilith may not escape. Descending deeper into the city to flee the spirit force, Lilith and Jack encounter a living child named Charlie who can communicate with them. Together they uncover a bond that just might be what they need to stop the creature from destroying the very fabric of time.