The Fifty Year Sword - Mark Z. Danielewski

In this story set in East Texas, a local seamstress named Chintana finds herself responsible for five orphans who are not only captivated by a storyteller's tale of vengeance but by the long black box he sets before them. As midnight approaches, the box is opened, a fateful dare is made, and the children as well as Chintana come face to face with the consequences of a malice retold and now foretold.