Monster is a very famous manga that has also been adopted as a 24 part anime. It features our main protagonist, Dr Kenzo Tnema, who is a brilliant and very young Japanese brain surgeon, who works in a hospital in Germany. Tenma does not like the way his patients are treated because of political bias.
He takes the opportunity to treat two young fraternal twins, Johan and Anna who have been fatally wounded after a massacre. Tenma takes the opportunity to treat Johan and does not treat the mayor who arrives later. Because of this, he loses his social standing and the mayor dies.
However, Tenma soon finds that several f his doctors who assisted in the surgery die under mysterious circumstances in Monster Manga. He treats another patient, a small while later, who mutters the word monster under his breath. After the surgery, he goes back to check up on him but finds him gone.
The guard at his door greatly injured. Tenma not wanting to lose another person follows the clues and comes to an abandoned construction site where he finds Johan, his former patient about to kill the one who has just been kidnapped.
Johan doesn’t kill Tenma (From Monster) saying that he can’t possibly kill the man who has saved his life. Tenma, on the other hand, follows a number of clues that lead him to an orphanage where the government is conducting experiments on children to turn them into super soldiers.