"Goddamn" is a dark fantasy anime series that explores themes of morality, power, and the consequences of human ambition. The narrative is set in a dystopian world where humanity is on the brink of extinction due to a catastrophic event known as the "Collapse," which unleashed monstrous entities called "Fallen" upon the earth. These creatures are remnants of a failed divine experiment, and their presence has plunged the world into chaos.

The protagonist, Kael, is a former soldier turned mercenary who harbors a mysterious connection to the Fallen. Kael's past is shrouded in tragedy, having lost his family during the Collapse. He is driven by a desire for vengeance against the Fallen, but his journey takes a turn when he encounters a young girl named Lira, who possesses unique abilities tied to the origins of the Fallen. Lira is revealed to be a "Harbinger," a being capable of controlling the Fallen, and her existence becomes a focal point for both human factions and the Fallen themselves.

As Kael and Lira travel together, they are pursued by the "Order of the Sanctum," a powerful religious organization seeking to harness Lira's abilities to restore their vision of divine order. Simultaneously, they face threats from rogue factions of humans who view Lira as a weapon to be exploited. The series delves into the moral ambiguity of its characters, as Kael struggles with his own motivations and the ethical implications of using Lira's powers.

The plot unfolds through a series of intense confrontations, political intrigue, and revelations about the true nature of the Fallen and the Collapse. Key supporting characters include Seraphina, a high-ranking member of the Order who questions her loyalty to the organization, and Draven, a rogue scientist who seeks to uncover the secrets of the Fallen for his own gain. The interplay between these characters adds depth to the narrative, highlighting the complexities of survival in a world where the line between good and evil is blurred.

"Goddamn" is characterized by its intricate world-building, morally ambiguous characters, and a storyline that challenges traditional notions of heroism and villainy. The series balances action-packed sequences with moments of introspection, creating a compelling exploration of humanity's struggle for survival in the face of overwhelming despair.