In 2121, a terrible pollution disease swept through the world. “We call it distortion, but perhaps, the history records of later generations will call it an evolution.” The evolution world was the epitome of the prisoner’s dilemma. Today, that person’s head split into two. Tomorrow, that flower would grow fangs. The day after that, that fish would climb ashore with its legs… Lu Yan: And I am merely a mediocre doctor who treats the pollution disease.