In drama, which is the representation and performance of fictional stories, the stage directions refer to information that appears in dialogues or before and after them and explains the characters or actors gestures, movements, actions, position, tone of voice, among others. Because of this, the stage directions serve as a guide for actors to know how to move and where to stand while dialogues are the lines they should say and the backstory explain the background of characters and their situation and is usually placed at the beginning of the play. Considering this, the part of a drama that provides information to actors about where to stand and what to do is the stage directions.
The mood (or tone) of the prologue is considered as sombre, dark, macabre... since from the start we're being told that this story is going to be a story of love, death and loss.
