Tens of thousands of years ago, the Twin Worlds split into two, separated by a turbulent ocean with year-round electromagnetic storms. Since then, mankind has taken two paths:
The constant quasi-community standardizes everything. There are no individual differences or unfair talents. As long as you meet the standards, you will have food. Lin Yan, a young technician who was born with a disabled right leg and walks on a standard exoskeleton, is the most devout believer in this system.
The fluid environment allows people to evolve freely. The body remodels with the environment. People in the deep sea have gills, and people in the sky have wings. Moss Wenlan, a "loser" whose left hand failed to evolve and can only take care of the aberrants in the conservation camp, is the person who most firmly protects the meaning of evolution.
The barrier cracked, the two continents met for the first time, and the evolutionary potential that had been suppressed for tens of thousands of years in the human body was completely awakened. And the ruins under the water that have been sleeping for tens of thousands of years are slowly opening to two little people who have been abandoned by civilization.
When both options have irreplaceable value and unbearable costs - what will you choose?