An immersive experience with submariners aboard one of France's four nuclear-powered ballistic missile submarines (SSBNs) that contribute to France's nuclear deterrent. Aboard the Vigilant, one of the four French SSBNs, men and women work in utmost secrecy. This ultra-sophisticated vessel is capable of diving to depths of up to 400 meters and remaining undetected for several months. It therefore requires a highly qualified and trained crew who regularly embark on missions in real-world conditions. An immersive experience with the men and women who contribute to France's nuclear deterrent.