What effect does mathilde's losing the necklace have on the plot in "the necklace"? it brings the action of the story to a quick resolution when mathilde meets madame forestier in the street. it sets up the rising action when mathilde breaks down and confesses to madame forestier that she lost the necklace. it creates suspense in the story, making the characters and the reader wonder if the necklace will be found. it creates the conflict in the story because mathilde has nothing to wear to the ball at the ministry.