In an alternate WWII timeline, the Nazis, teetering on the brink of defeat, unlock the terrifying secrets of nuclear warfare. As the shadow of global annihilation looms, a small village under German occupation is ravaged by a mysterious disease that has already claimed many lives. Thirteen-year-old Ilsa must navigate a world unraveling into war, despair, and prophecy. Under the cold, calculating gaze of Herr Mueller, the sadistic local commander, she quickly learns that survival demands more than obedience — it demands courage, sacrifice, and a confrontation with forces both human and unseen. Lurking at the edges of tragedy is a mysterious man dressed in black, visible only to Ilsa, whose presence hints at secrets older and darker than the war itself. As she uncovers the truth about him and his three enigmatic brothers, the relentless hammering of a mad carpenter building an Ark in the middle of a landlocked country marks the rhythm of impending doom. A haunting tale of innocence under siege, fighting against impossible odds, and the fragile line between hope and despair, Ilsa and the Four reveals the cost of survival and the quiet, enduring power of resilience, even in a world on the edge of annihilation.