When your sin is not caused by free will, can you still choose to bear it? When consciousness can be uploaded and memories can be shared, where is the boundary of "me"? Blue is both the color of melancholy and the womb of life—and the Blue Age is when humans finally learn to listen to the heartbeat itself.
In the thirty-seventh year of the Blue Age, the sea level swallowed 90% of the land. Human beings huddled on giant floating cities, fighting for the last resources under the gray sky. Deep-sea explorer Lin Shen received a "Hai"-level mission—to collect unknown samples from the Kermadec Trench, the deepest in the Pacific Ocean. Accompanying him are the psychological evaluator Shen Du, the silent mechanic Lao Cui, the young navigator Jian Xi, and a teammate who died long ago in the accident but exists in another way.
The truth is emerging: sea level rise is not a climate catastrophe, but the final step in a billion-year plan for ocean consciousness. It wants to incorporate all human memories into its own network, so that human civilization can be remembered forever before the stars burn out. Lin Shen chose to become a bridge and disappear into the structure of the deep sea. Shen Du returned to the sea with the memories recorded by the neural replay device, but found that the foundation wanted to cover up the truth and turn her into a machine to decode the ocean.
Will he become a prisoner in the laboratory, or will he become the "voice of the abyss" that connects the two worlds? When she walked barefoot to the sea, three billion years of ocean memory awakened in her body - there were no monsters there, only the oldest home forgotten by mankind.
