"Beware the eyes of Baron Tyme." The evil Baron Tyme has taken control of Man-Bat’s wife, Francine, forcing her to try to kill one of his colleagues. Even with the aid of Batman, Man-Bat will be hard-pressed to contain his wife and capture the evil baron.

Man-Bat, better known as Robert Langstrom, finds out his wife is turning into this vampiric She-bat and stealing for a sorcerer named Baron Tyme. Langstrom tries to stop her by turning into Man-bat. To complicate things even more, Batman has entered the battle, thinking Langstrom has returned to his life of crime.