La Nuit de la Vérité is situated in an imaginary West African country. After ten years of civil war between the government army of the Nayak, led by 'Le président', and the Bonande rebels led by Colonel Theo, there is some sign of peace negotiations. But not everyone is in favor of peace and one can feel the tension. The night of truth starts with a festive dinner, but the village idiot Tomoto always seems capable of ruining the attempts for peace with violence and provocation.

Mossane is a beautiful 14-year-old girl who has just reached marriageable age in a village in Senegal. She has many suitors, including a simple-minded farmer's son who plans to drag her away. Even her own brother Ngor is in love with her. However she is in love with Fara, a poor student who has returned to the village, while the university is on strike. At birth, she had been promised in marriage to Diogoye, who went away to work in France. Diogoye, who supplied her parents with many things over the years, has now sent a dowry, and asked that she be married to him in the village in his absence; she would then be sent to France.