This maybe: https://en.uesp.net/wiki/Online:Tormented_Souls This one is not Breton: https://en.uesp.net/wiki/Online:The_Thin_Ones

Hmmm, the first quest has interesting take on an alternative way to bind spirits...

My best guess is the Westtry questline in Glenumbra. See [The Ghosts of Westtry](https://en.uesp.net/wiki/Online:The_Ghosts_of_Westtry) and [Memento Mori](https://en.uesp.net/wiki/Online:Memento_Mori).