Toby suddenly blinked, bumping into Avi, who was standing in front of a strange vault-like building.
"Ah, you're here! Good, good!" She chirped, clapping her hands together. "I saw your sister come this way, so I sent out a signal. It's wonderful that you can hear what my heart has to say!"
Toby nodded gravely, then said, "So... how to get in...."