Carl Kolchak has seen it all, from vampires and zombies to witches, ghosts, and even the minions of Hell, itself. By rights, nothing should shake this indominable reporter anymore. But, when he starts to follow the trail begun by the photographing of a strange sea creature, one more reminiscent of the creature from the black lagoon than a shark or tuna, he suddenly finds himself being drawn into a nightmare world so fantastic, so utterly alien and frighteningly dark that even his massive psychic defenses begin to crumble. For once, Kolchak isn't just following a story; he isn't merely uncovering yet another monster a step or two up from a serial killer. This time he's crossing the threshold into another reality, one which could possibly destroy both his mind, and the entire world!