"Get Backers" is a manga series set in a world where the protagonists, Ban Mido and Ginji Amano, operate as a retrieval team known as the Get Backers. Their mission is to recover lost or stolen items for clients, no matter how dangerous or impossible the task may seem. The duo operates under the slogan "100% retrieval success rate," and their reputation for completing jobs is unmatched, despite their eccentric personalities and frequent financial struggles.

Ban Mido is a skilled fighter with the ability to manipulate reality through his "Evil Eye," a power that creates illusions so convincing they can cause physical harm. Ginji Amano, on the other hand, possesses immense electrical powers, earning him the nickname "The Lightning Emperor." Together, they form a formidable team, balancing Ban's cunning and strategic mind with Ginji's raw power and emotional drive. Their partnership is rooted in a deep bond of friendship, though their pasts remain shrouded in mystery for much of the series.

The narrative unfolds primarily in the sprawling urban landscape of Shinjuku, with a significant portion of the story revolving around the enigmatic and dangerous Infinity Fortress, a massive underground labyrinth filled with powerful factions and individuals. The Infinity Fortress serves as a central hub for many of the series' key arcs, as Ban and Ginji delve into its depths to retrieve items or confront their own pasts. The fortress is divided into multiple levels, each controlled by different groups, and its structure reflects the complex power dynamics at play.

Throughout the series, Ban and Ginji encounter a wide array of allies and adversaries, many of whom possess unique abilities or connections to the Infinity Fortress. Notable characters include Kazuki Fuchoin, a skilled swordsman and former ally of Ginji; Hevn, a recurring client with ties to the criminal underworld; and Makubex, a young prodigy with a pivotal role in the Infinity Fortress. The series explores themes of loyalty, redemption, and the consequences of power, often delving into the backstories of its characters to reveal their motivations and struggles.

The plot is driven by a mix of episodic retrieval missions and overarching storylines, with the latter gradually revealing the deeper connections between the characters and the Infinity Fortress. As the series progresses, Ban and Ginji's pasts are unveiled, shedding light on their origins and the events that shaped them. The Infinity Fortress itself becomes a focal point, with its history and purpose intertwined with the fates of the main characters.

"Get Backers" combines action, humor, and drama, with a narrative that balances intense battles and emotional moments. The series is known for its intricate world-building, particularly in its depiction of the Infinity Fortress and the various factions within it. The dynamic between Ban and Ginji remains a central element, driving the story forward as they navigate the challenges of their missions and confront the shadows of their pasts.