Strange disappearances haunt the town of Arkham, Massachusetts. With each object, building or person that disappears, they are erased not only from physical existence, but also from history and memory. Only a select few researchers remember those who disappeared – or so they believe.

Before long, the mystery unravels into an international conspiracy, and our attentive investigators are recruited by a shadowy government agency whose sole purpose is to collect and research paradimensional tools they call "Keys." However, they're not the only ones looking for it...