The adoptive son of the Adattu family, Marco, sets off on a ruthless quest for vengeance after his brother is brutally murdered, finding only betrayal, loss and unimaginable brutality at every step.

Karthik makes a documentary on Alzheimer's disease. His subject, Malathi Menon, lives in a small town outside Harippad with her daughter Athira. Karthik and his team arrives at Malathi's place and start noticing her inexplicable behavior.