Imogen Poots on the red carpet in Cannes. Working with Stewart deepened the experience. “She’s absolutely incredible — instinctive, very precise, completely singular,” said Poots.

Imogen Poots seizes the screen as Lidia Yuknavitch, who embraces swimming and sex and drugs and anger, all to make herself whole. The hope paid off. “The Chronology of Water” isn’t some ...