The Vapor

Jenna and her friend, Annabeth, are very close neighbors. Jenna introduced a kid named Nathan to Annabeth. Jenna went to the same elementary school with him for a year in fifth grade but after a month or so he left the school. Jenna didn't know why he left but he did and he went to a private school. All three of them were close than all of sudden the two girls fear of death because what Nathan said and did to them. What did he do? Did the two girls survive?