They never expected to live long enough to retire, but the crew of the "Aegis" got lucky. In the ten years since the end of the Shillaqi war, they've dodged the press, diehard fans, and their own inner demons. A new threat is detected at the edge of the solar system and the washed-up superheroes, are still Earth's best hope. They are sent to investigate as their young replacements struggle to complete their ship, the "Shinigami." Earth isn't completely reliant on the Earth Defense Force and their warriors, a multinational fleet assembles to repel the threat. As the conflict begins, the awful truth comes to light, someone on Earth is helping the aliens. With the odds stacked against them, can the crew of the "Aegis" survive one more battle? Do they even want to survive?