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Sunil Sarkar's pen-friend Father Francisco arrives at Mongla Church in year 2002 to work on the biography of Sunil. Parallely, Sunil crossed the border In 1978 to set foot on Dumurjhapi to help Bangladeshi refugees.

Daniel and his friend Sohel agree to work as guides to help Francisco explore their surroundings. Meanwhile, Francisco starts looking for Sunil's old friend Marshal. Observing his activities, Daniel and Sohel's suspicion Intensifies towards Francisco.

In 1978, tensions peak between Marsal and the pirates, led by Raisu, the frontman of the Rait Party. This results in Raisu's visit to Marshal's house to settle a score.

The 1978 photographs of Dumurjhapi taken by Sunil were published in The New York Times. Through local powerplay, an Indian agent named Sharma creates pressure on Mongla Church to keep Sunil away from Dumurjhapi.

Under the pretext of protecting the Sundarbans, the Indian government pressurizes refugees to return to the Dandakaranya forest. The police expel all outsiders from Dumurjhapi and impose a blockade.

Marshal forms a rebellion group with his allies, in order to protect the deprived souls. Following Francisco's inquisitions and Kazi's words, Daniel gets an Idea that only Mashal is capable of informing about Sunil Sarkar's whereabouts.

Local thugs, the police, and armed goons of agent Sharma prepare to wreak havoc on Dumurjhapl. Meanwhile, Sunil Sarkar teams up with Marshal and his rebellion group, and arrive in Dumurjhapi to save the lives of the refugees.