A social activist, Sridhar Ranjan, is missing in action in Majuli, the largest inhabited river island in the world. 7 years later Sridhar is about to be declared dead when his friend Abhijit, a journalist, comes in search of him.
Abhijit is an outsider trapped in hostile, terrorist infested conditions with distant islanders. His only hope is the beautiful local guide Sudakshina. But like the unpredictable river Brahmaputra, her existence has unseen undercurrents.
Will Abhijit be able to solve the mystery? Is he walking down the same path as his friend Sridhar Ranjan? Does a similar fate await him as the River flows?