Around 1980, in Tunisia, Si Béchir, an old craftsman, sold his house and left the medina of Tunis with his family to settle in a new city on the outskirts of the capital. With his son Ali and his niece Aziza, the old man discovers a new way of life in a Tunisia in full change. Aziza becomes friends with Aïcha, a young actress, while Ali continues to fail in his little businesses. The arrival of a sheikh from the Persian Gulf will fuel all the desires in the city, including those of Ali. But the dream is short-lived.

Dib moves with his younger brother and their mother from his home town of Quneitra to Damascus after the death of his father. The children’s grandfather, who was known for his tyranny, reluctantly agrees to shelter the grieving family, and tries to force his daughter to marry again. The magic of the city of Damascus takes over the conscience. Dib, whose main concern has become discovering all the secrets of this city, is driven by his heart full of dreams, but he sees nothing in his life except humiliation and cruelty. The fragrance of childhood dies in Dib's heart, as he grows up in light of the political fluctuations that prevailed in the fifties (the end of the military dictatorship in Syria at that time, the nationalization of the Suez Canal, Nasser’s rise to power in Cairo, and Egyptian-Syrian unity in 1958), so that his rosy childhood dreams were shattered on the rocks of cruelty and violence. The city's dreams turn into a nightmare..

After the battle of Kfar Chouba in Lebanon in January 1975, Larbi Nasri, a young Algerian journalist, was caught in the whirlwind of events preceding the civil war. Linked to Maha, Hind, Raouf and Michel who surround Nahla, he witnesses the construction of the myth of Nahla, a singer adored by the Arab population. One day Nahla loses her voice on stage. The atmosphere of crisis that reigns around her is spreading like an infection. Larbi, fascinated, loses his footing and gets bogged down.

Trio is a cinematic series of filmed portraits that shows, in a single large, fixed and silent shot of 3 minutes and 20 seconds, three people free to do what they want.

Jocelyne Saab, a young Lebanese journalist and director, interviews the director and the film crew while filming Nahla in Beirut.