A young man has the rare gift of recognizing every sound he hears. On board a French nuclear submarine, everything rests on him, the Golden Ear.
Deemed infallible, he makes an error that puts the crew in danger of death. He wants to regain the confidence of his comrades but his quest leads them to an even more dramatic situation.
In the world of nuclear deterrence and misinformation, they find themselves trapped in an uncontrollable gear.