Naoki Urasawa's Monster Season 1 Episode 13 Petra and Schumann

As Tenma continues his search for Johan, he stumbles upon a young girl named Petra who has been abandoned in an old factory. Believing that Johan may have had a hand in Petra's situation, Tenma takes her in and starts to investigate her past.

Through his investigation, Tenma discovers that Petra's parents were murdered years ago and that she was taken in by a wealthy couple named the Schumanns. However, after some time, the Schumanns began to mistreat Petra and eventually abandoned her in the factory where Tenma found her.

As Tenma digs deeper into the Schumanns' past, he discovers that they are involved in the illegal organ trade and were responsible for the deaths of several young children who were used as organ donors. Horrified by the Schumanns' actions, Tenma decides to take matters into his own hands and confronts them.

Meanwhile, Inspector Lunge continues his hunt for Tenma and Johan. His investigation leads him to a hospital where he discovers that the hospital director has been covering up a string of suspicious deaths. Lunge begins to suspect that Johan may be involved and sets his sights on capturing him.

As the episode comes to a close, tensions rise as Tenma and Lunge both continue their quests for the truth. Will they be able to discover the full extent of Johan's plan before it's too late? Tune in to find out.