In the dead of winter, fear is spreading through Gotham like a flu virus. Hundreds of residents have gone mad with fright, and dozens more are affected each day. Fortunately, Batman and his teenage partner, Batgirl, are on this medical case. And soon, the root of the problem is revealed. Scarecrow, the Dark Knight's most frightful foe, has taken over a dentist's chair, and is gassing patients with his evil fear toxin. If he isn't stopped soon, the entire city could be scared to death!