This poignant saga is set against the backdrop of Calcutta in 1971. The story begins with rehabilitation official Venu (Mohanlal) coming to Calcutta in one of his regular visits to shift about 35 to 40 refugee families to the Andaman Islands. The current rehabilitation plan is that only those who fall under the category of schedule caste farmers. People in Andaman, too, are not happy about taking in refugees.
All the refugees have been staying in Permanent Liability Camp in Rana ghat, West Bengal for the past two decades. Experiencing the shattered lives of poor displaced people deeply hurts Venu in his silent moments alone in his small lodge room frequently finds himself lost in the thoughts about the lives of the refuge seekers he meets during the day. Living an oppressed life, their only hope being the occasional promises of land, cattle, and other grants by the bureaucratic state.
Aravindan takes us closer into the life of a refugee when Venu realizes that the sorrow of one refugee family is his own. One day, an old lady, Arthi Panicker (Neelanjana Mitra) comes to meet Venu in his lodge. She speaks broken malayalam which surprises Venu. She's a refugee from East Bengal. She desperately wants to move out of the wretched Calcutta for a better future of her children, a daughter (who's completed MA but never appeared of the examination) and a son about whom she's very sad.
Her daughter Damayanti (Neena Gupta) quit studies and is a communist revolutionary on parole. Venu realizes that they are no one but his own uncle's family, his uncle Kunjunni Panicker whom he admired so much, a poet and revolutionary who left home long back (probably to join Bose's INA) when Venu was a child.
Venu visits home in Kerala, a typical matrilineal Nair household, to discuss about his chance meeting with Kunjunni uncle's family and also to secure their rightful share for them. Venu's mother has no sympathies for Arthi Panicker and her kids. Kunjunni uncle's land is in possession of Venu's aunt Bhavani (Padmini) who, as a beautiful teenager had secret affairs with Kunjunni and his brother Anandan.
Venu remembers his childhood days where he used to run secret errands for a young Bhavani played by Shobana. Aunt Bhavani is more sympathetic towards Arthi. Having never met the wife and children of the man she once loved, she's curious about them. She agrees to give them the land or money, whatever is convenient to them. (One gets the impression that at the late time of her life Bhavani is leading a lonely, guilt-ridden life, having destroyed the lives of both the brothers — she married Anandan who commits suicide, probably due to unhappy marriage.)
Venu returns to Calcutta and reveals his identity to Aunt Arthi. She is pleasantly surprised; she and Damayanti finally feel a sense of security and belonging in their lives. But Arthi rejects the financial help from her husband's family who hadn't allowed her to enter the compound of the house when she visited them years back.
Arthi narrates the humiliation of having to return on a hot summer afternoon from the locked gates of her husband's ancestral house, she and Kunjunni breaking down on their way back. Immediately after their return to East Bengal, the country gains independence and in the consequent partition they sought refuge in Indian side. Kunjunni dies of cholera in the refugee camp and a pregnant Arthi is left on her own in abject poverty, with two-year-old Damayanti by her side.
Venu meets Damayanti's brother who is also a communist revolutionary hiding from the police. Venu's arrival into their life brings long lost hope and happiness. But its short-lived as its time for Venu to return to the Andaman Islands with the selected refugees. As the rest of Calcutta celebrates Durga puja, a few bunch of refugee families are packed in the back of a goods truck and offloaded at the harbor. Arthi and Damayanti arrive at the harbor to see him off. Damayanti is not able to control her emotions and breaks down inconsolably as Venu hugs her, himself overcome by sadness.
Arthi Panicker looks on emotionless, her face hardened by years of victimization. The film ends tragically as Venu has to rush hastily into the ship about to depart, abruptly ending his goodbye to his uncle's family. As Venu rushes through the crowded stairways of the ship, a crying Damayanti shouts from behind, “Write to me Dada... Damayanti Panicker, Apilore Central Jail, Calcutta”.
The ship moves towards Andaman, beginning a new journey, a new era for a few Vasthuharas, towards the green shores of a new promised land somewhere in the eastern islands, a land new hope. But even as a handful of them find hope, another wave of exodus begins, which ends in the Indo-Pak Bangladesh liberation war in December 1971.
Displaced from their homes, unwanted outsiders in their land of refuge, doing sundry small time jobs, working in abject conditions as bonded laborers, some wait to return to their land, some simply give up, and some others like Damayanti and her brother, become rebels.
