He was sent to Dawn's Reach to free the cursed ghosts at the Forgotten Shore while progressing the following questline you help him in his task
[72] Imprints on the Past
[72] Orik Trueheart and the Forgotten Shore
[72] The Murkweed Elixir
[72] The Forgotten Tale
[72] The Truth Shall Set Us Free
[72] Parting Thoughts
[73] What Secrets Men Hide &
[73] The Path of Redemption &
[73] The Return of the Crusade?
[73] Frostmourne Cavern