Half a century ago in Japan, the captain of the pearl harvesting vessel "Yahata No. 9" submerged off the coast in an attempt to retrieve pearls from a sunken ship, only to mysteriously disappear. Similar incidents had occurred before, drawing widespread attention. Two years later, near Darwin in northern Australia, Japanese diver Masao Matsumoto faced a similar mysterious disappearance, believed to be linked to an unknown creature.
In the summer of 40 years ago, Australian diver Jones plunged into the ocean and was pursued by a great shark. Strangely, the shark did not harm Jones; instead, in the dark depths, he encountered a massive gray-black creature. This monster had no limbs, eyes, or mouth, resembling a smooth slab. It moved slowly, occasionally shaking its body. When the water temperature suddenly dropped, the great shark seemed paralyzed, losing its ability to resist, and was consumed by the creature, which then vanished into the deep sea.
What exactly is this monster? Why does it trigger such bizarre phenomena? For over 40 years, these mysteries have continued to perplex the scientific community. To uncover the secrets of this deep-sea monster, many scientists bravely venture into the depths, as this enigma remains unsolved to this day.