Mr. Hyde is in Gotham City, and he has only two demands: meat, and the black diamond. Reginald Forsythe is neither inclined nor allowed to give him either. Dr. Jekkyl has instructed him to kill Hyde, if he will not give up his control over Jekkyl's body. Reluctantly, Hyde does so, and the good doctor insists that he must aid Jonah Hex in his search for the formula that was stolen from him. Casually, Hyde explains that the formula was incomplete, driving people mad because it lacked a special something; the black diamond.