If you want to understand this genre, you cannot rely on just one film. Here is the essential viewing list for the Onaayum Aattukkuttiyum enthusiast.
[Injured Gangster "Wolf" on Road] ---> Saved by ---> [Medical Student "Chandru"] | [Ruthless Cops & Rival Killers] <--- Hunting Down <------------+ The Fateful Encounter onaayum aattukkuttiyum moviesda
Why is this film the archetype?