The oceans, the unknown world, the beginning of all life, appears for the first time in all its beauty, wealth, cruelty and its crushing power. For a total of six years, no less than 70 expeditions were carried out in 50 different places in the world, all beneath the sea surface. 12 production teams filmed over 100 different animal species, in situations and environments it had not previously been possible to film. The teams had to invent new technology and advanced equipment to successfully capture the ocean as it is. Teresa Tingbrand (Aftonbladet) describes it as "An unforgettable close contact of the third degree."