They buried their secrets, but not deep enough ... Hannah McCullough's life is far from perfect, but you'd never know it by looking at her. Instead, you'd see a beautiful young mother wholly devoted to her two children and a docile wife utterly besotted with her self-made millionaire husband, Allan. You'd see the designer clothes she wears, the luxury car she drives, the dewy-eyed au pair she employs. You wouldn't see the dark secret she carries. But when a construction crew unearths the body of a young girl near the McCulloughs' vacation home on Orcas Island, Hannah has no choice but to confront her past. She wonders how much Allan knows about the victim and the apocalyptic cult she was connected to. Meanwhile, Allan can't seem to understand why his beautiful young bride, as polished and pristine as the collectible artifacts in his glass case, would threaten their fairy-tale lifestyle by digging too deep, in places she knows she shouldn't. As the police investigation into the gruesome discovery deepens, the facade of Hannah's picture-perfect marriage starts to crumble, and she soon finds herself on a dire hunt for answers. And Hannah's search takes an unexpected turn after she crosses paths with three strangers with shocking secrets of their own.