When Enzo Ma travels to Saturn's moon Titan to visit his friend, Jed Cresta, things are about to get complicated. When Enzo meets Jed's teacher and mentor, Dr Penelope Lane, she seems short-tempered and behaves strangely. Later that night, Dr Lane's behaviour grows even more bizarre at a party honouring one of her fellow scientists. The next morning when she doesn't show up at the lab, Enzo and Jed decide to go to her quarters to see if she's okay. But when they arrive they discover Dr Lane's dead body - sitting on her couch with a book lying at her feet. Later the authorities find evidence that seems to show that Jed is responsible for her death. But why would Jed want his mentor dead? And why was Dr Lane behaving so strangely the night before? It's up to Enzo to uncover the truth and save his friend during his visit on the Poison Moon! Part of the Mysteries series.