1 - Close on Chris' fist raised and ready to knock on the door.
2 - On Chris, recoiling in surprise at the cough from within.
MARY (from within): hargk!
3 - Chris furrows her brow, uncertain of what she's just heard.
CHRIS (quietly): Mer?
4 - On the door.
5 - On the door, moving closer and with a focus on the peephole.
MARY (from within): Chris?
6 - On the door and peephole, so close that we're really just looking at the peephole's glass, possibly seeing a warped reflection of Chris standing in front of it.
MARY (from within): What are you doing here?
7 - On Chris, having gathered her senses a bit more and looking determined. Or more determined. Perhaps she's still holding one arm with the other or biting her lower lip as she searches for the right word.
CHRIS: I'm-I'm here to make things right.
8 - Back on the door.
9 - Long shot looking down the hallway towards Chris. She bows her head in defeat. She should be small due to the distance.
MARY (from within): You should leave.
Start from the beginning.