yes, and you wont be able to finish the dungeon solo coz it's just a 1 boss run, the bosses are using debuff attacks, stuns and blows, you need a segnale for it or a lot of malakites and a good tanker, otherwise your party will die and you will fail the round. the dungeon time limit is 5 minutes if I remember right. once a party quits the dungeon nobody can reenter it within 5 or 10 minutes (not sure again) but the map itself holds like 20 units so that's not a problem

also, use party search for that map, it's easier than just gettin over there and running around. there are usually people setting parties and just waiting for it to fill up.
oh well, you'll find out how it works I guess.