Keira closes her eyes as if focusing entirely on her other senses. It isn’t clear whether she even hears Irene, but she speaks nevertheless.

Keira, faintly: Such a beautiful song…

Irene: Huh? What song?

Keira’s eyes open and there’s a strange light in her otherwise vacant eyes.

Keira: It’s…calling to me.

She steps forward as if pulled, leaving Irene behind.

Irene, with fear: Keira?

Irene rushes forward, now on the edge of panic. 

Irene: NO NO NO NO!

She’s desperate to catch up to Keira and do…something, ANYTHING, before-