Listen to me Yakob... find the bird in the loop on the other side of the old man's grave on September 3, 1940, and tell them what happened...
Jacob's Grandfather Abe
Jacob Magellan Portman has a grandfather who knew the peculiar children before fleeing to America. Jacob witnessed his grandfather being killed by what Jacob would soon learn to be a hollow. He experiences trauma and nightmares, so his parents hire a therapist named Dr. Golan. Golan suggests that Jacob visit the place where his grandfather lived which is the old house that the peculiar children live in on September 3, 1940, all day, every day.
Oh No! What Happened??
When he was younger, Jacob Magellan Portman loved to listen to his grandfather's stories about living with peculiar children and running from monsters during WWII. Jacob's Grandfather was killed, and this causes Jacob to have lots of nightmares. Jacob's parents take him to Dr. Golan, who is a psychiatrist. Jacob has the same ability his grandfather had and is able to see the Hollows.
Good! I got rid of Dr. Golan as well!
The antagonists are the hollowgast and the Wights. The hollowgast were created when a bunch of peculiar people thought they could use a time loop to achieve immortality. This failed, created a massive explosion in Siberia and turned all the peculiars into hollowgast. A Wight is a hollow that has consumed enough peculiar children. You know that someone is a Wight if their eyes don't have pupils. The Wights aid the hollows in finding Peculiar children. Hollows are unable to enter a time loop, but Wights can.
Jacob! We got Miss Peregrine back! Lets get out of here! But they got Miss Avocet!
The Hollowgast and the Wights found another time loop and killed all the peculiar children, but the ymbryne, who's name is Miss Avocet, managed to barely get away. Jacob, along with all of the other peculiars, realize that something has to be done about the hollows and wights. They realise that they are no longer safe in their time loop.
Jacob and the other peculiars found a hollow outside of the loop, which attacked them. Luckily, they managed to kill the hollow. This was thanks to Jacob's ability to see the hollows. Jacob realizes that Dr. Golan was a Wight, and that Jacob led Dr. Golan right to the peculiars. They didn't realize that Dr. Golan had taken Miss Peregrine until very soon after. Miss Peregrine is trapped in her bird form.
Jacob and his friends find Golan near a lighthouse attempting to escape on a boat with his other fellow wights. Golan is killed by Jacob, but just then the other wights arrive. Jacob and the peculiars are able to rescue Miss Peregrine, but Miss Avocet is taken away.