Twilight is trapped, her mind is ensnared in two worlds. One dark, one light. In one world she refuses to believe, in the other she can't remember. And she's not alone. A nightmare shadow, something out of Tartarus itself, stalks her. Clues to the past, links between worlds, old friends, and new enemies pave the way, but is Twilight strong enough to survive? Will she be able to escape the horrible nightmare, or will it consume her mind and damn her to eternal darkness?