So it's basically about a guy transmigrating into a game that he had played for 10 years. He posseses a guy and directly gets sentenced to death by a judge and becomes a death row inmate. He is then sent to prison. In prison he wants to earn money so that he can buy better meals and such (he can probably also buy gear and enhancements and the like, but I haven't seen something like the shop yet. But there are indeed others with combat implants and such, so it should be possible). One of the ways to earn money is by going to the Dark Zone and bringing back valuable stuff from there like fuels or confidential documents. The Dark Zone is a dangerous place, there are monsters and he also must be carefull of other prisoners who are also scavenging for loot.