With his friend Noël, Bruno composes electronic music. As he is about to sign a contract with a producer, he falls in love with a woman's voice (Lisa), heard over the telephone. They meet at night, in a hotel, in a total darkness. After a few encounters, Lisa disappears. Obsessed with these brief encounters, Bruno is going to look for her thanks to only sound elements: a voice, hummings, whispers. With all these elements, as many white stones of their story, he will try to write a piece of music that could sublime this impossible love.