The climax of the story happens when Edmund discovers the location of his sister aboard the Sunrise. His decision to rescue his sister himself, in defiance of Poe, begins the highest part of the action of the story and leads directly to the resolution, which is the final rescue of Sis. This point in the story represents a kind of thematic turning point as well: Edmund's figuring out of the meaning of the word "Sunrise" in the note and his decision to disobey Poe represent a major change in his character. Previously, the mystery of Sis's location had been investigated by Poe, who believed that in writing the story of Sis's abduction he could also write its conclusion. Edmund's disagreement with Poe at the end of the novel illustrates his independence and growing maturity, of course, but it also is a kind of struggle for creative control over Poe's writing: Poe doesn't want Edmund to rescue Sis, because he has already written the ending, and she dies. When Sis is rescued, Edmund has effectively rewritten Poe's story. He has, in effect, become the author of his own story!