After a long period of scientific research, human beings have acquired powerful immortality. However, there are mutants in any era, and "Xiao Sa" is one of them. He has no immortality and has a hard time surviving among the immortals.
While he was struggling to fight alone, he met "Phil", a scavenger with the same mutant physique. Phil showed his kindness to Xiao Sa and invited him to work with him. The safety-oriented "Xiao Sa" and the adventurous "Phil", is this combination really possible?
