What is the conflict of Vampire Diaries?

Vampire Diaries follows Elena Gilbert, a young woman who falls in love with brothers Stefan and Damon Salvatore. Their relationship becomes a love triangle as they each hide secrets from each other and struggle with their own inner demons. The main conflict of the series revolves around the love triangle between Elena and the Salvatore brothers and their fight against supernatural threats from other vampires, werewolves, and witches.