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.

In 1978, the conflict between Marshal and Roisu, the fierce Raite Party leader in the Sundarbans, reaches a boiling point. To teach Marshal a lesson, Roisu raids his house.

In 1978, Sunil's photographs documenting the plight of the Dumurjhaphi refugees appear in international newspapers. Indian agents Sharma and Kazi arrive at the Mongla Church. With the help of influential local figures, they put pressure on the Mongla Church to keep Sunil away from Dumurjhaphi.

While searching for the photographs of the Dumurjhampi massacre, Daniel becomes confused. If Sunil is dead, then who sent the letter? And if Sunil is still alive, then who is buried at the church? Whose hands are the photographs actually in? Daniel becomes desperate to meet the mysterious man, Marshal.

The time for the final assault on the Bangladeshi refugees approaches. RAW agents Sharma and Kazi begin their secret preparations. Meanwhile, Sunil takes the side of the refugees and positions himself in Dumurjhaphi. In the middle, Marshal remains neutral.