Le Grand O is a castaway, a man lost in the desolate landscape of his soul, but who was given a second chance. If he succeeds in deciphering the message delivered by the sea, he can save his skin. Le Grand O is an Orlando Furioso, a knight who lost his mind and left to find it. Maybe his greatness is just there, in recognizing himself disarmed in the great silence of the world. Le Grand O is a dreamlike and surreal story, slowly revealed in the images in black and white.