The male protagonist who lost part of his memory suddenly woke up one day!
Following Nineteen's guidance, what he saw was his long-dead family members, a polluted world, extreme weather, mutated creatures, and some humans who turned into monsters. Strange plants grew wantonly and flooded the places where humans once lived.
Through profound journeys, the friends he made showed him the way ahead, and he kept searching to repair the remaining memories.
Purpose: Everyone you meet in life will more or less teach you some truths invisibly, and even change you.