Pritha, a middle aged housewife stays with her husband Alokesh and her 8 year old son Riju in a house in the outskirts of Kolkata. Her life changes all of a sudden when a stranger enters Pritha's house at night and takes Pritha and her son Riju as hostage within few moments. Riju, the 8 years old son, however without any apprehension starts getting fond of this unwanted guest. Pritha also surprisingly strikes a friendly chord with the stranger in the house..There is something weirdly charming about the stranger which draws Pritha's attention. As time passes Pritha goes through a range of emotions of eminent fear, astonishment and eventually develops a connection with the apparent terrorist. Is there something more to it? Watch out ZBCO, Raater Atithi on 16th October only on Zee Bangla Cinema Originals.