The Troubled Painter?

I have seen things that suggest there is a story around a Troubled Painter somewhere in Fallen London, but as of yet have no real ideas where to start to look for this story. I’m in late-game content, with primary qualities (without equipment) ranging from 83 to 180, and equipment sets with better than +40 for all four primary stats. Any gentle pointers that could get me started?

The Troubled Painter is part of the Dadd Wing storyline, which is not generally available - it was only released for Sunless Sea Kickstarter backers.

Ah, and I only got Sunless Sea by buying it early on Steam. Pity, that.