"Fate/strange Fake" is a spin-off of the larger "Fate" franchise, set in an alternate timeline where a false Holy Grail War unfolds in the fictional American city of Snowfield. Unlike the traditional Holy Grail Wars, which are orchestrated by the Mage's Association and the Church, this iteration is an imitation, created by a rogue faction seeking to replicate the ritual's power. The story explores the chaos and unpredictability of this flawed imitation, as Servants and Masters clash in a battle for supremacy.

The narrative begins with the summoning of Servants, heroic spirits from history and myth, by their respective Masters. However, the flawed nature of the ritual leads to irregularities, such as the summoning of multiple Servants for certain classes and the emergence of anomalies among the participants. Key figures include Ayaka Sajou, a young woman with a mysterious connection to the Grail, and her Saber-class Servant, who exhibits unusual behavior and memory loss. Another central character is Flat Escardos, a whimsical and eccentric mage paired with the enigmatic Berserker-class Servant, Jack the Ripper.

The story also introduces a diverse cast of Masters and Servants, each with their own motivations and backstories. Notable participants include Tine Chelc, a Native American mage allied with the Archer-class Gilgamesh, and Jester Karture, a vampire-like figure who manipulates events from the shadows. The interactions between these characters drive the narrative, as alliances shift and betrayals unfold amidst the escalating conflict.

Thematically, "Fate/strange Fake" delves into the consequences of tampering with sacred rituals and the moral ambiguities of power. The flawed Grail War serves as a backdrop for exploring the complexities of human ambition, loyalty, and the blurred lines between heroism and villainy. The series maintains a balance of action, intrigue, and character-driven drama, staying true to the "Fate" franchise's core elements while introducing fresh twists and perspectives.