In the gleaming metropolis of Ross City, Antarctica, Eden Wing is a brilliant inventor and top student determined to step out from his brother's shadow. Overshadowed by the legendary Daniel Wing—once known as Day, the hero who saved the Republic of America—Eden yearns to make his own mark on the world.

But Day has changed. Years after the revolution, he has withdrawn into solitude, sacrificing his great love, June, to keep Eden safe. As Eden pushes the boundaries, he's drawn into the dark underbelly of Ross City—a place where danger lurks and secrets threaten to unravel everything.

A new threat emerges, one that pulls Eden deeper into peril and challenges Day in ways he never anticipated. With Eden entangled in a world that even Day's heroics can't penetrate alone, the brothers must confront their past and decide how far they're willing to go to save each other.

In a city on the brink, will they rise together—or will the shadows consume them both?