Screaming too loud is what got Horacio killed, with his murderer Guillaume now released from prison, what will he do next?

Photographer Joe Bunni's search for clues and his images of the habitat "5 meters below and above the surface of the sea" are the focus of this breathtaking documentary. An extraordinary life is concentrated in this space between air and sea... Among other things, the film shows the catastrophic consequences of global warming and unforgivable environmental pollution, and looks for ways to preserve these natural habitats.