Set in The Vampire Diaries Season 3, Yn Salvatore, the 100-year-old heretic sister of Stefan and Damon, arrives as a powerful witch-vampire who looks 18. Best friends with Elena and Caroline, she stands against Klaus Mikaelson when he comes to Mystic Falls. Their dynamic is love at first sight mixed with enemies-to-lovers tension, power struggles, and a dangerous attraction that threatens everyone.