Hello! From your description, it sounds like it might be "Sorrows Unmasked" by NoStraightLine, part of their longer "Trying to Find the In-Between" series.
I hope that's helpful :) By the way, in the future if you are looking for a lost story you might find it useful to post questions like this to the Sherlock Search community (Sherlock-search.livejournal.com), their whole website is designed to help people find fic.
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I hope that's helpful :) By the way, in the future if you are looking for a lost story you might find it useful to post questions like this to the Sherlock Search community (Sherlock-search.livejournal.com), their whole website is designed to help people find fic.