You can't see or hear them directly. And you may never know exactly where they are lurking in the murky deep. This fascinating film takes us inside the French navy's legendary undersea vessel, the Rubis, and into the shipyard where the nuclear submarine, the Barracuda, is being built. Within the tangled metal and electronic machinery of these sophisticated vessels is the future of war and power.

You can't see or hear them directly. And you may never know exactly where they are lurking in the murky deep. This fascinating film takes us inside the French navy's legendary undersea vessel, the Rubis, and into the shipyard where the nuclear submarine, the Barracuda, is being built. Within the tangled metal and electronic machinery of these sophisticated vessels is the future of war and power.