To Travel or Not to Travel?

Ever since Henry died Sienna has had to rebuild her life. Not only because she lost the love of her life, but because his twin sister/her best friend, Joan, has been withdrawn and won't talk to her. Sienna would love to travel back in time and change what happened, but “the rules” don't allow you to go back and change things like that. Besides, her parents had her cuffed so that she can’t travel at all without their knowledge. It really makes it difficult to do well on tests when you can't go...