Raj B Shetty and Aparna Balamurali star in the revenge drama “Rudhiram,” set near Thrissur’s Chimmini Dam. Debut director Jisho Lon Antony’s film explores the changing lives of a postgraduate student and a mysterious ‘guest.’ The film’s tagline, ‘The axe forgets, but the tree remembers,’ hints at the characters’ duality.