Imagine waking after spending more than two decades in suspended animation. You awaken to a world more terrifying than your worst nightmare. A world where human beings are hunted down by giant insect-like creatures called the Blue. Welcome to Earth in the year 2031...a time when the planet is no longer ours. Earth's very survival now rests in your hands.
(Source: Funimation)
— Description from AniList community (anilist.co).
