The Shadow Lord is bringing his fight directly to Dark Matter Investigations, and if Simon and Virgil want to stop him before he destroys the very fabric of Templar, they must piece together the clues to the evil creature's sinister plan-including vanishing mansions, shadow soldiers, and a subway line that's draining an extraordinary amount of power. But the boys are still reeling from the elemental attacks of the Refracticore, and Llewyn has been rendered powerless by his ice prison. Templar needs its warriors more than ever, but the only one who might be able to help is the evil sorceress of legend, Morgan le Fay. Meanwhile, Simon can't quite put his finger on it, but something seems different about Virgil... is the explosive third book in the Dark Matter Series that will have you hooked on every word and gasping your way through an ending you won't believe.