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Tenma learns that Johan used to be in an orphanage known as Kinderheim 511, where he meets an injured boy named Dieter and a former East German official named Hartmann who used to work there.
A city council member and his wife are killed in Verden, Germany. Tenma believes that Johan could be the murderer, so he breaks into the council member's home for clues. There he meets a petty thief named Heckel. Heckel says that he saw the murderer and leads Tenma to the murderer's house.
Dieter is picked up by Hartmann before Tenma could return, and Tenma learns more about the experiments in Kinderheim 511.