Calcutta, 1969. A three-year-old girl in a strict vegetarian household announces she wants fish for lunch. She’s never had it, never seen it in the house. She says she remembers another life, a mud house by a river, a different mother, catching and cooking fish. The family hauls in Dr. Shoma Bose, a psychologist who studies what the literature calls cases of the reincarnation type, and what the child tells her rearranges how Bose sees the world. Fifty years on, that old case file surfaces among environmental activists, and Bose’s nephew Dinu gets pulled into the search for the woman that girl became. The trail runs to the Sundarbans, the tidal mangrove forest at the mouth of the Ganges, where the water is sacred, communal, and being eaten by industry.