The manga tells the story of a pair known as the GetBackers, consisting of Ginji Amano and Ban Mido. The duo reside in one of the seedier areas of Shinjuku in Tokyo, and are often broke and resort to sleeping in their car. Ban and Ginji operate a freelance repossession service. For a fee, they will recover any lost or stolen item for a client. The two boast an “almost 100% success rate”. Their motto is: “We get back what shouldn’t be gone”.
However, Ban and Ginji are not ordinary human beings. They each possess mysterious abilities which they use to carry out their many recovery missions. Ban’s powers include the “Snakebite”, a skill which gives his hands a grip of 200 kilograms-force, and the “Evil Eye“, an ability to induce minute-long hallucinations of Ban’s choosing in whomever he makes direct eye contact with.
However, this ability cannot be used on the same person twice in a 24-hour period, and he has to rest between uses. The Evil Eye can also only be used three times in one day.
Ginji, on the other hand, can generate enormous amounts of electrical energy in his body for tasks such as attacking opponents, or overloading electronic systems; this has earned him the moniker of “Lightning Lord” /Thunder Emperor”, or “Lightning Emperor”).
Despite the simplicity of their job’s description, Ban and Ginji’s profession often places them into bizarre and dangerous situations in order to obtain the objects they must find. Their targets range from everyday objects such as a video game a school kid has lost to an even much more dangerous object which might just affect the safety of the nation.
As such, the plot mostly revolves around the dangerous (yet sometimes silly) adventures they both go through, which is often complicated by connections to the pair’s dark and twisted pasts, and a mysterious place called Infinity Fortress/Limitless Fortress/Infinite Castle/Maze City.
There are numerous “acts” in the story. Each act, divided into a number of chapters, describes a different recovery task taken on by the GetBackers. As the story develops, new characters (some with past relationships with Ban and Ginji) are revealed, and details of a shadowy conspiracy involving the GetBackers slowly rise to the surface.