Martina is a young commoner whose passion for reading has driven her to consume every book available in her town’s public library. With no new material left to discover, she sets her sights on the royal library inside the palace, which is off‑limits to ordinary citizens. The only way to enter is to become a civil servant, so Martina takes the notoriously difficult civil service examination. Thanks to her extraordinary total‑recall memory, which allows her to remember everything she has ever read, she achieves a perfect score—a feat that has not been accomplished by a commoner in years.

She is assigned to the General Affairs Office, a department that handles coordination among the kingdom’s various branches of government. Most of her new colleagues are nobles, and Martina faces prejudice and discrimination because of her low birth. Despite this, she uses her encyclopedic knowledge to solve problems and support her superiors, gradually earning their respect. Her direct superior, the capable and fair‑minded official Roland, becomes an early ally and mentor.

The kingdom is threatened by an unnatural surge in monster attacks, and Martina’s unique abilities place her at the center of the crisis. As the General Affairs Office becomes the hub for managing the response, Martina’s memory proves invaluable: she recalls obscure historical records, military tactics, monster biology, and administrative procedures that allow the government to respond effectively. Her quiet goal remains access to the royal library’s untouched shelves, but the kingdom’s survival increasingly depends on her knowledge.

The story unfolds through multiple arcs. Early chapters focus on Martina’s adjustment to palace life and her struggle against class‑based hostility. Later arcs send her to investigate corrupted lands and monster‑infested territories, often alongside the aloof noble‑born rookie Sylvain and the pragmatic knight Roland. A major arc involves a mission to the Cadour Count’s domain, where the party discovers an entire town transformed into a monster nest. Another central thread is the mystery of a recurring miasma that seems to generate monsters endlessly—a phenomenon that ancient texts, which only Martina can fully recall, may hold the key to stopping.

The world is a fantasy setting with a rigid social hierarchy and a magic system where about thirty percent of the population can use magic, but only a tiny fraction possess combat‑grade abilities. Light‑ and dark‑attribute magic are especially rare, with dark magic viewed with suspicion. The kingdom’s knight orders are divided among royal guard, monster suppression, and regional defense, all of which require the coordination that Martina’s department provides.

The narrative balances bureaucratic problem‑solving with action, as Martina must prove herself in a world that undervalues her background while quietly becoming indispensable to the realm. Her motivation remains personal—she wants to read books—but her influence steadily grows until she is solving national crises almost by accident.