Is there a quest about the slave traders in the slums, or do you just run in there and kill everybody?

What's this quest about the magical sword under the Copper Coronet?

And, last but not least, how do I get into the rest of the rooms in the Coronet?

Thanks in advance.

ok,,kill all the slavers you'll get exp and thanks later,,the sword reguires 4 items in the sewers,,the bond of 2 lovers, a hand, the blood of a best friend,and a shaman's staff, find the room with the pipes and solve the riddles,,it's worth it,,not a total spoiler rather cryptic in fact,,

To get into the rest of the Copper Coronet, talk to Lehtinan (near the shopkeeper). Tell him you want to spend some money and ask for advice, then go for the "other services".

A little too late in replying there Lord Balduran, I found out myself :). Thanks anyway guys