In 2002, award-winning novelist Colin May purchased a home high in the Hollywood Hills. It was everything he dreamed of and even came with a 1960s bomb shelter in the garden, which he planned to turn into a private wine vault. Things didn’t go as planned.

Working on his latest book, loosely based on the disappearance of his famous artist father, Colin becomes incapable of separating fact from fiction and within weeks of moving into the new home he begins to hear voices, and see images, often waking up to a distant deep calling from somewhere on the property.

Colin’s novel, a masterpiece, grows in its intensity as his imagination and terror wreak havoc with his grasp on reality. All those around him, his nephew, his agent, and his husband try desperately to help Colin return to reality, but the calling, the voices from the bomb shelter are growing louder, louder, louder.

As Colin battles the demons in his head, he finishes the final chapter of the book with a climactic and terrifying meeting with an old acquaintance in the bomb shelter.