The main characters are Jacob Portman, Abraham Portman. Mrs. Alma Peregrine. Emma Bloom. Dr. Golan. The setting of the book mostly takes place in the peculiar children's home in Cairholm Wales. The book takes place in September 2-3 1930.
Jacob Portman unfortunately witnessed his grandfather, Abraham Portman, die and also saw an unknown scary figure he believed killed his father.
Jacob, Emma (Jacob and his grandfather's former love), and a few other peculiar children disobey Mrs. Peregrines rules and go to figureout what's been causing the recent killings to soon discover they are being attacked by a wight and kill it.
Jacob shoots the hidden wight, Dr. Golan who was Jacob'd previous counselor, and shoots him in the neck causing Dr. Golan to die.
Jacob decides to stay wight he peculiar children and Mrs. Peregrine who is in her bird form. They all find a new time loop and Jacob fight the monsters.
The conflict of the book was Jacob vs Wights. The theme of the story, I believe, is to never be afraid to overcome your fears because it'll pay off in the long run.