An old apartment house in downtown Plague with a signboard of 3 frogs... A woman lived there with twin kids some ten years ago. Tenma learns that from neighbours, they also tell him about the Czechoslovakian secret police and a questionable fire. Could the twins be Johan and Anna?? Meanwhile, Suk, a young detective of the Plague Police, gets attracted to a beautiful girl he met in a bar. Her name is Anna! When Tenma and Suk meet, another terror creeps up on Plague!


