So in this book, Grushenka apparently has been spiritually transformed and it recovering physically from her sickness. Grushenka thinks Dmitri is falling in love with Katerina again so she sends Alyosha to get the info from Dmitri.
Along the way. Alyosha stops to visit Lise who is constantly praying for god to make her suffer. When Alyosha arives at the prison and sees a monk leaving and asks Dmitri and he said the monk is writing an article about how bad Dmitri's childhood was and why he killed his father. Ivan had come earlier to the prison to show Dmitri a way to eascape from prison.
The Servant for the Karamazov confesses he has killed Fydor but didnt act alone. When Ivan returns home he plans to tell the court what the servant has told him but instead he is greated by the "devil" the devil is so full of criticism and knows so many of Ivans deepest secrets. Ivan is so startled by the devil that when he sees Alyosha he can't even explain what just happened.