Can I save her?

I bought this mini phal for my office and it declined rapidly. I’ve never been successful rescuing one when they are this bad off.

I wasn’t sure what was going on at first. This winter the office building has been SO hot and very dry so I thought that’s what was causing this. When all of the leaves but one dropped off in less than a week, I took it home to try and save it. It was packed SO tightly with Sphagnum moss and wrapped in plastic! I should’ve checked sooner.

Do you think if I repot with bark mix or just air it out for a few days it’ll be OK? I also used this technique once where you put what’s left of the roots in water for 24 hrs and then put in in an empty jar to stimulate root growth.

Any ideas?