The Heart of Dibella

Walkthrough
Should the Dragonborn dare wander into the Inner Sanctum of the Temple of Dibella, the high priestess Hamal will sternly reprimand for entering without permission. As penance this quest is launched.

Find the future Sybil of Dibella
As penance the Dragonborn is asked to swiftly bring the young Sybil to the Temple of Dibella. As it turns out she lives in Karthwasten. Upon reaching Karthwasten, a talk with her father Enmon reveals that she has been taken by the Forsworn to the Broken Tower Redoubt. Enmon offers to come along and help (this should be discouraged though, he would just get in the way).

Rescue Fjotra from the Forsworn
And so the Dragonborn travels to the Broken Tower Redoubt, after battling through the large redoubt, a showdown with a Forsworn Briarheart, lets the Dragonborn free Fjotra, i.e. the young Sybil, from her cell.

Bring Fjotra to the Temple
Once in the open the Dragonborn can directly quick travel to Markarth (no need to walk the distance) and then continue on to the Temple of Dibella. Talk to Hamal, who cannot believe that the new Sybil is finally at the temple.

Pray at Dibella's Altar
Hamal directs the Dragonborn to the Altar for a reward. Dibella will bestow: Agent of Dibella.