The show-runner spoke to Entertainment Weekly about the season finale of the CW series, revealing that the next season will delve into Damon (Ian Somerhalder) and Elena's (Nina Dobrev) relationship.
"[S]eason three is gonna be about exploring what it means to her, what it means to Damon, and certainly what it means to the Damon-Elena-Stefan relationship," said Plec.
In the finale of the second season, Stefan (Paul Wesley) traded himself to Klaus (Joseph Morgan) in exchange for a cure for Damon, who had been bitten by Tyler (Michael Trevino) two episodes before. The season closed with Stefan and Klaus leaving Mystic Falls.
"We're very energized about Stefan's new journey and how Klaus plays into that and how that's all gonna turn out," Plec added.
The producer had previously teased that Stefan was desperate to save his brother, particularly since Damon was finally coming to terms with his human side.
The Vampire Diaries will return for a third season in September.