A Prague police detective from a special investigative team has been killed in Suk's room, and now Suk is being chased as a suspect in a series of murders. Tenma reads about the case in a newspaper...

While searching for the sign with the three frogs, Nina is surprised that she knows the surrounding buildings and streets, but there is a shadow of fear in her memories. Meanwhile, Tenma and Grimmer get an important testimony from Lanke. Inspector Lunge takes a holiday in Prague.