This is a sequel to Joey Graceffa's book : Children of Eden.
Rowan is locked up in jail, but when she least expects it, she's back with Ash. Before any of the nonsense happened. She still has her lenses, and everyones questioning her. She figures out she can time travel, and she uses it to destroy evil, and maybe for some of her personal problems.
I do not own any of the characters nor the original story.
You don't really have to read the book to understand this, but it will make more sense if you did.