After you save the businessman and the opening credits run, you end up in Rosa's apartment. The last thing she said was that she thinks she's supposed to be somewhere.
When I have that feeling, I look at my calendar to see what I have scheduled for today.
The calendar shows that you agreed to go to the opening of a new art gallery with Nishanthi, your neighbor. But ... where is it? (Odd that she invited you to this opening but didn't tell you where it is, but ... oh well.)
Your computer is your friend here. Click on the computer, then choose "Search" and type in "Park Gallery." This puts the gallery on your map.
At the gallery, schmooze around, talk to people, and enjoy the art. (Switching to Joey and getting his take on the art is entertaining, but not required.) There's one person here who has a lead on a new case for you.
Talk to your neighbor Nishanthi and ask about her friend. Monique has a ghost story to tell --
-- but she doesn't want to talk about it now. She gives you her business card and says you can come visit her tomorrow.
You now have the option to either cut out early and go home, or stay for a glass of wine.