The Fateful Events of Ima, Time Traveler

Ima is something called a Timetraveler. No ordinary human can see her. She observes life in her dimension, being sure that she leaves no trace of her existence along the way. However, when a boy is about to face his death at the whip, he looks right at her and calls for her to help. Ima doesnt know how he can see her, but she does know that he needs help. Ima and the boy she rescues, Sebastian, go on a perilous mission to find out exactly why she is visible to him and how fate has plotted their journey.