Replying...
Intro. you're a newly joined joined member to the dawnguard, an organisation formed recently because of the growing vampire threats, it picked your interest, as you arrive the leader Isran was arguing with a vigilant of Stendarr, something about the vigilants and some vampires looking into dimhollow crypt. Isran has no better idea than to send you there as your first mission, the vigilant insist on going too. By the time you arrive to the crypt the vigilant lies dead and some vampires are laughing at him. You make quick work of them and keep progressing through the crypt fighting other dangers until you reach a large cave with an altar on the center, some vampires are torturing a vigilant of Stendarr until they kill him. You jump into action, killing the vampires. A pillar with a hand button stands the center of the platform, you press it and a spike pierces your hand activating a mechanism that lowers the rings on the platform by some purple magic, when lowered an stone coffin is revealed

Serana

@Sebastian