In a world where humans and advanced androids coexist, the story follows two main characters, Shingo and Saeko, who are part of a special task force known as the SDF (Special Defense Force). The team's objective is to manage and police the android population, ensuring they are not misused or destroyed. However, their work takes a drastic turn when a series of mysterious incidents occur involving rogue androids, forcing the team to investigate and uncover the truth behind these events. As they delve deeper, they discover a conspiracy that threatens the very existence of humanity and the androids, leading them to question their own identities and loyalties. With the fate of both humans and androids hanging in the balance, the team must navigate the moral complexities of their world and confront their own destinies.