Dakar, Senegal, 1987: On a rainy night after a wild party, the British ambassador's wife, Vivienne Hughes, is involved in a car crash. Her vehicle hits the motorbike of a young Senegalese doctor, Aime Tunkara, killing him. Pleading diplomatic immunity, Vivienne and her husband flee to England. Three decades later, Aime's little sister, Lily Tunkara, now a high-flying lawyer in Dakar, finds a photograph that compels her to investigate what really happened that rainy night. As Lily faces increasing hostility from the local community, she turns to Vivienne Hughes, the only remaining witness, but is either woman prepared for the truth to emerge? Past Participle is the story of two women bound together by the faultlines of the past, a study of love and guilt, power and desire, retribution and forgiveness.