Head to the Casino and ask for a room, look through each door. There will be 2 doors locked I believe.
Yes, two doors are locked. I already talked to the white haired woman (I believe that was Lady Santina?) before going to the shrinking lab behind the bookshelf. But now that this part is finished, she is not at the Casino anymore. I am lost there.
Now go head to the docks to talk to the girl inside the bar.