In 2025, marine sonar engineer Lu Chenzhou awakened to a strange ability in an accident: he could "hear" the emotional fluctuations of marine life from sonar echoes, and even "read" memory fragments hidden deep in the seabed. What's even more frightening is that an old long-wave sonar equipment connected him to the end of the world in 2045 - a global algal bloom broke out, the land was suffocated, and humans retreated to the deep sea. A girl named Shen Wei is one of the last survivors of the Undersea City "Dawn". Lu Chenzhou could not only hear the distress signal she sent, but also read her unspoken fear, loneliness and secrets from the sound waves. As the connection across time and space deepened, he discovered that the algae tide was not a natural disaster, but the result of the awakening of an ancient alien entity sleeping in the abyss. And those "abyss echoes" he heard were exactly the monster's heartbeat before it woke up. Lu Chenzhou must prevent disaster now and save mankind in the future. But his biggest secret is that he not only has the ability to read minds, he can also use sound waves to rewrite the consciousness of living things...
