As Hal Jordan and Supergirl pursue the theft of the Book to Ventura, Batman and the Blue Beetle team up to find and apprehend his earthbound accomplice... no easy task, as this alien is equipped with the Haruspex, a weapon that can analyze probability to create precisely the kind of attack most likely to eliminate a threat.But when the Lord of Time leads the Fatal Five to acquire the Haruspex, do these two heroes have a chance of getting the weapon before someone gets away with it?