"Phantom in the Twilight" is a supernatural anime series set in modern-day London, blending elements of mystery, fantasy, and action. The story centers on Ton, a Chinese exchange student who arrives in London to study abroad. Shortly after her arrival, she becomes entangled in a hidden world of supernatural beings when she encounters a mysterious café called Café Forbidden. The café serves as a sanctuary for creatures of the night, including vampires, werewolves, and other mythical entities, who coexist with humans while protecting the city from dark forces.

Ton’s life takes a dramatic turn when she is targeted by a shadowy organization seeking to exploit her unique ability to see and interact with supernatural beings. This ability draws the attention of the café’s enigmatic staff, who take her under their protection. The staff includes a diverse cast of characters, each with their own supernatural origins and abilities. Among them are Luke Bowen, a vampire with a stoic demeanor; Wayne King, a werewolf with a playful personality; and Bayron, a ghost with a tragic past. Together, they form a protective circle around Ton while investigating the threats emerging from the shadows.

As the narrative unfolds, Ton discovers that her connection to the supernatural world runs deeper than she initially realized. Her presence in London triggers a series of events tied to an ancient prophecy, which threatens to disrupt the fragile balance between humans and supernatural beings. The café’s staff must confront their own pasts and loyalties as they work to uncover the truth behind the prophecy and protect both Ton and the city from impending chaos.

The series explores themes of coexistence, identity, and the clash between light and darkness, set against the backdrop of a richly atmospheric London. The plot weaves together episodic mysteries with an overarching narrative, gradually revealing the secrets of the characters and the world they inhabit. Through its blend of supernatural intrigue and character-driven storytelling, "Phantom in the Twilight" offers a compelling tale of alliances, sacrifices, and the enduring struggle between humanity and the unknown.