the person in the first panel asks why it's so dark, but doesn't reappear, so no real idea who they are, and the girl looks quite shocked in that panel, without any real clue as to why (is it in reply to what the person said? did they not know the person was there so made them jump?). The middle bit is a little confusing as I'm not sure which way to read. After looking at it a bit more, my guess of what is going on, is she looks at this wierd looking door, goes through, then it bangs closed behind her? but again not 100% sure. The last panel is fine, because it's obvious it's leading up to the next few panels her bringing the tray to whoever was just speaking to her.