Hide-and-creep

Elijah is making a fort out of an old cabin in the woods behind his new home when he is greeted by a mysterious girl named Iris, who insists on a game of hide-and-seek; Elijah searches but it is only when it grows dark that Iris suddenly reappears, angry about being left alone in the woods--and when the same thing happens the next day Elijah begins to wonder just who--and what--Iris is.