989 A.D

Darlene de bargay was auroras "soul sister",Tristan's fiancé,and luciens life long childhood best friend.Well,until the mikaelsons came along and ruined everything while fixing it.What happened back in 972 A.D.?Why does Tristan,Lucien and klaus all have a thing for her?What happens when all of them reunite and see each other after 1,000 years because of a prophecy?