The “Vengeance Trilogy” is a loose thematic grouping of films by Park Chan-wook, consisting of Sympathy for Mr. Vengeance (2002), Oldboy (2003), and Sympathy for Lady Vengeance (2005). While not connected through a continuous narrative, the three films are unified by their focus on revenge as both a driving force and a destructive cycle, often following characters whose pursuit of justice leads to moral ambiguity and irreversible consequences.