Atsushi Saito, a devoted young husband, eagerly visits his wife, who is nearing the end of her pregnancy, sharing in the anticipation of their growing family. But their happiness is abruptly overshadowed when an unprecedented threat emerges: a mysterious parasitic wasp that targets only pregnant women. Faced with this unknown and terrifying parasite, Atsushi must confront his deepest fears and summon all his courage to protect the woman he loves and their unborn child. Can he safeguard his family from this horrifying invasion, or will their dreams of happiness be forever shattered?