Nameless Soul:
Naturally, I have a plan! After you defeat the shadows of Halisha, my friend will come and let you out. He'll teleport you to the Temple of Pilgrims and open the Sealed Boxes for you.
My companion doesn't care for the shadows of Halisha, and he won't show up until they're all dead. Basically, you must defeat all the shadows if you are to escape! Don't forget to ask my friend to open all the boxes when you meet him.
"The Temple of Pilgrims is very far from here!"