When Jiaolong-12 broke through the depth of 21,800 meters, the sonar screen suddenly jumped out with regular flashing light spots. Oceanographer Su Rui stared at the metal buildings that made up the Fibonacci sequence and discovered that the same frequency sound wave that caused the submarine crash three years ago was coming from her left breast pocket - there was the only survivor of that year, who was sharing her heartbeat frequency with her in a deep-sea diving suit.
Actor: Lu Chen, 32 years old, chief technical officer of the National Deep Sea Emergency Salvage Bureau. Due to traumatic deafness caused by the rescue operation three years ago, his right ear wears a smart hearing aid that can capture infrasound waves. Known as "humanoid sonar" in the industry, it can map terrain through equipment vibration feedback in the complete darkness of the deep sea.
Heroine: Su Rui, 29 years old, marine microbiologist. Specializing in life forms in extreme environments, the left prosthetic arm is equipped with a self-made bioelectric sensing device. He lost his left arm in a submarine accident three years ago, which led to the discovery that deep-sea microorganisms have neural network properties. He is currently the chief scientist of the "Seventh Abyss" scientific research project.
