In the year 3023, Omnipolis, the world's capital, faced an invasion by extraterrestrial beings known as the Solarians. As Earth mobilized its forces to combat the threat above ground, humanity also sought refuge underground. Amidst this chaos, Sera, a woman pursuing dual degrees in Criminal Law and World History, found herself thrust into an unexpected role. Initially driven by her passion for understanding the events of the late 2000s, a turbulent period marked by the loss of world leaders known as the Soveres, Sera's academic pursuit soon becomes intertwined with the unfolding crisis, leading to her unforeseen deployment.