Rama, a young writer, is expecting and worried about her future motherhood. She travels to St Omer to observe the trial of Lawrence Kohli. The accused killed her 15-month-old daughter by leaving her to be swept away by a tidal wave on a beach in Northern France. The explanations and witnesses' testimonies heard during the trial shake Rama's convictions and allow us, the observers, to assess our prejudices. The film is based on a true story. "Director Alice Diop, who has made documentaries until now, is very sensitive to the characters in her films. For her feature debut, she has chosen a true story and up-and-coming actresses whose impressive work is impossible to take your eyes off. Watching them, one gets a stronger sense of how difficult it is to reveal the truth - the deepest and most subtle nuances of inner states - to those who follow rules, societal norms and traditions. This is a contemporary return to the Medea myth - in this process, the "who" is clear from the start. What is not clear is why?"