"Magatsu Wahrheit -Zuerst-" is set in the Wahrheit Empire, a technologically advanced society where the use of magical energy, known as "Wahrheit," powers both everyday life and military endeavors. The story unfolds in a world where the empire faces internal strife and external threats, with a focus on the lives of ordinary citizens caught in the crossfire of political and supernatural conflicts.

The narrative centers on two main characters: Innumael, a young courier working for the Transporter Guild, and Leocadio, a soldier in the Imperial Army. Innumael, despite his humble occupation, becomes entangled in a conspiracy involving a mysterious artifact known as the "Magatsu Device," which holds immense power and is sought after by various factions. Leocadio, on the other hand, is driven by a sense of duty and loyalty to the empire but begins to question the morality of his actions as he uncovers darker truths about the government and its use of Wahrheit.

As the story progresses, Innumael and Leocadio's paths intersect, leading to a collaboration that challenges their beliefs and forces them to confront the empire's hidden agendas. The Magatsu Device becomes a focal point of the conflict, with its potential to either save or destroy the empire. The series explores themes of power, corruption, and the impact of war on individuals, as the characters navigate a world where the line between right and wrong is increasingly blurred.

Supporting characters include members of the Transporter Guild, Imperial Army officers, and various civilians, each contributing to the intricate web of alliances and betrayals. The empire's reliance on Wahrheit and the consequences of its misuse are central to the plot, highlighting the tension between technological progress and ethical responsibility.

The series balances action, intrigue, and character development, presenting a layered narrative that delves into the complexities of its world and the people who inhabit it. The interplay between personal struggles and larger societal issues drives the story forward, creating a compelling exploration of a society on the brink of collapse.