A possible concise summary is:
Jen tells her mom about a creepy encounter she had as a child with a stranger who pinched her arm and asked her how she would like it if someone peeled her skin off. Her mom reveals that the stranger was a stalker who had a van and a storage locker full of pictures of Jen and a torture chamber. Jen tries to confront him but he kills himself before they can meet.
Here are some key facts extracted from the text:
1. Jen had a childhood encounter with a creepy stranger who pinched her arm and asked her how she would like it if someone peeled her skin off.
2. The stranger had been stalking Jen for at least two years and had a van and a storage locker full of pictures of her.
3. The storage locker also contained a dentist chair, knives, chains, handcuffs, and an anatomy book, suggesting he had sinister plans for Jen.
4. Jen's mom knew about the incident but did not tell Jen until decades later, when Jen saw her nephew peeling bark off a tree and remembered the event.
5. Jen tried to meet the stranger in a mental institution to ask him why he did what he did, but he killed himself before the meeting.