Daniel, a biologist studying the disappearance of fish, is haunted by paternity. It is by looking for a woman who could be the mother of his children that he will come across a strange fish and discover what he really lacks: love.

Paris, fall 2015. Every week, Philippe Dayan receives in his office a stone's throw from Place de la République, a surgeon in the throes of romantic disarray, a couple in crisis, a teenager with suicidal tendencies and a BRI agent traumatized by his intervention at the Bataclan. Listening to these upended lives, the emotional earthquake that unleashes within him is unprecedented. In an attempt to escape, he reconnects with his former analyst, Esther, with whom he had cut ties for nearly 12 years.