An unreliable narrator is a first-person narrator that for some reason has a compromised point-of-view. In all stories with a first-person narrator, the narrator serves as a filter for the events. What the narrator does not know or observe cannot be explained to the reader. Usually, however, the reader trusts that the narrator is knowledgeable and truthful enough to give them an accurate representation of the story. In the case of an unreliable narrator (sometimes called a fallible narrator), the reader has reason not to trust what the narrator is saying.