Earth did not expect what happened after World War III. An alien species named Viator lands back on Earth which is now irradiated and full of viruses. They are hunting for the remaining inhabitants to completely own Earth. Even though they used to form coalitions with humans. There are a handful of teenagers who are immune to radiation and viruses. They survive under Viator's terror. One of them is Diara, an 18 year old girl. Together with other immune teenagers he is determined to take Earth back. Not only immunity, other mysteries are revealed as Diara goes through her adventures. He is faced with various phenomena that he thought were impossible.