A New Order

Start
When the Dragonborn arrives at Fort Dawnguard, several vampires will attack. Afterwards, Isran will tell the Dragonborn to recruit a Nord called Gunmar and a Breton called Sorine Jurard to help the cause.

Gunmar
Gunmar can be found at Pinepeak Cavern. He says he's been hunting a bear for two weeks and he first wants to kill the animal. After the Dragonborn kills the bear inside Pinepeak Cavern, he'll head to Fort Dawnguard to see why Isran needs his help.

Sorine Jurard
Sorine can be found west of Druadach Redoubt and south of Darkfall Cave. She can be persuaded to immediately go to Fort Dawnguard. Otherwise she first wants a Dwemer gyro before she goes to Fort Dawnguard.

End
After heading back to Fort Dawnguard, Isran will test both persons on being a vampire. He'll tell Gunmar and Sorine about the current situation.

The quest will be completed and the next, Prophet, will begin.

Appearances

 * The Elder Scrolls V: Dawnguard