Hello Masker112,
Prison is already up for some time. A reset has to happen to change and improve with lots of excellent new features, to make the game more exciting for you all! This then allows you players to have a fresh start and new players can begin to play without any significant disadvantage.
This means all cells, items, money and the map will be reset. Nothing will be kept leftover from the previous map. Of course, all purchases will be reissued so nobody will be out of pocket in that regard. I know this must be a disappointing revelation for a lot of you, but think about the exciting new changes, the new alliances you can forge, the new map, the new features and updates the different kinds of gameplay, and style is provided with this update will surely make it a worth-while and exciting reset!
Hope this helps you.