As Julian (guest star Todd Lasance) and Lily (guest star Annie Wersching) throw a party to celebrate Mary Louise (guest star Teressa Liane) and Nora's (guest star Scarlett Byrne) anniversary, Stefan (Paul Wesley) and Damon (Ian Somerhalder) set in motion a risky plan to eliminate a new threat posed by Julian. Meanwhile, following a major revelation uncovered by Valerie (guest star Elizabeth Blackmore), Caroline (Candice King) is forced to face her new reality, even as it threatens to destroy her relationship with Stefan. Finally, determined to do what's best for her family, Lily makes the most difficult decision of her life.
