In the deepest reaches of space, on a ship that no longer exists, six travelers stare into the abyss . . . and the abyss stares back.

Man has finally mastered the art of space travel and in a few hours passengers can travel light years across the galaxy. But, there's a catch—the traveler must be asleep for the journey, and with sleep come the dreams. Only the sleeper can know what his dream entails, for each is tailored to his own mind, built from his fears, his secrets, his past . . . and sometimes his future.

That the dreams occasionally drive men mad is but the price of technological advance. But when a transport on a routine mission comes upon an abandoned ship, missing for more than a decade, six travelers—each with something to hide—discover that perhaps the dreams are more than just figments of their imagination. Indeed, they may be a window to a reality beyond their own where shadow has substance and the darkness is a thing unto itself, truly worthy of fear.