Welcome welcome. Soup you are correct, the current party consists of a rogue and a barbarian.
So, if you haven't read the game thread up to this point, let me catch you up to speed on the basics: there is a ruined city, formerly a holy city that was built to amplify the power of a goddess. Now it has been taken over by devotees of an evil god, who are using it to amplify his power, spreading madness and corruption through the world. Warriors go into the city periodically, mostly hoping to reduce its impact by reducing the numbers of enemies there. There are also some records indicating that special altars can be used to purify sections of the city, making them more or less safe to traverse--at least for a while.
Your goal is to go in, make your way to the altars, and purify the city piece by piece. Mechanically, an altar acts as a checkpoint, and once you reach it you can go back to a nearby town without any resistance, and return to the altar when you've rested up to resume your adventure from the same place. (If you try to leave before reaching the altar, you're still fighting your way through enemy territory and there's no guarantee you'll make it.)