Editing is one of the most important tasks in filmmaking, both narratively & aesthetically. The present work seeks to develop a better understanding of the role of the editor in film. As a starting point, the report defines the process of editing & the technical aspects involved in it. The report takes on a case study about how the process of editing the short fiction film ‘O Lobo’ led to the change in narrative, the protagonist & ended up as a significantly different film ‘Bruxa’, followed by a statistical overview & insight into the workflow of the project. My study & findings in this paper will be a guide to the process I used throughout the three stages of filmmaking while working on the project ‘Bruxa’. In summary, the research includes how the process of editing can affect a film’s narrative & discusses the technical & aesthetic choices that are an integral part of it.