London, late 1990s. Stan, a young and promising French composer, is invited to arrange the music for a theatrical adaptation of The Picture of Dorian Gray.

The play will never be staged, but Stan will meet the love of his life there, Liv, and their harmonious duo soon becomes a trio with the birth of their beloved daughter, Lisa.

Paris, Mouzaïa district, today. After Liv's fatal accident, Stan returns to France surrounded by darkness. He now shares his life with Babette, a lifeguard and mother of a boy of Lisa's age, and Laïvely, an AI machine of his own invention endowed with Liv's voice.

But Stan remains haunted by his past. As false notes and discord increase, and Laïvely seems to take on a life of its own, memories and reality blur … and Stan’s new family implodes…