Damon and Stefan try to provoke Elena into turning her humanity back on, and Caroline is frustrated when her attempt to intervene backfires.
Acting on a mysterious tip that a plot is brewing against him in New Orleans, Klaus makes a trip to the town he and his family helped build. Klaus' questions lead him to a reunion with his former protégé, Marcel (guest star CHARLES MICHAEL DAVIS – Grey's Anatomy, The Game, Switched at Birth), a charismatic vampire who has total control over the human and supernatural inhabitants of New Orleans. Determined to help his brother find redemption, Elijah (recurring guest star DANIEL GILLIES) follows Klaus and soon learns that Hayley (recurring guest star PHOEBE TONKIN) has also come to the French Quarter searching for clues to her family history, and has fallen into the hands of a powerful witch named Sophie (guest star DANIELLA PINEDA – Homeland). Meanwhile, in Mystic Falls, Damon and Stefan continue with their plan for Elena, while Katherine reveals a surprising vulnerability to Rebekah (recurring guest star CLAIRE HOLT) and asks her to deliver a message.
Elijah proposes a life-changing challenge for Rebekah. Caroline finds that her plans for the perfect prom night are disrupted by Elena.
Elena and Rebekah (recurring guest star CLAIRE HOLT) take off in search of Katherine and find themselves in a small town in Pennsylvania, where Elena has a surprising encounter with another old acquaintance: Elijah (recurring guest star DANIEL GILLIES). Stefan and Damon are both concerned about Elena's state of mind and are determined to do what's best for her, but she makes it clear that helping her will be difficult. Damon is not sure how to react when Stefan reveals his unexpected plan for the future. Meanwhile, in Mystic Falls, Klaus receives Caroline's reluctant help and comes to a new understanding of Silas' powers.
Realizing that Elena needs some time away from Mystic Falls, Damon takes her to New York City, where he lived and partied hard in the 1970s.
Elena's new outlook has everyone concerned, leading Stefan and Damon to agree that going back to the normal routine of high school would be the best thing for her. Caroline is pleasantly surprised when Elena decides to rejoin the cheerleading squad, but her pleasure turns to shock when Elena's behavior proves dangerous. Not giving up on their search for the cure, Damon and Rebekah (recurring guest star CLAIRE HOLT) work together until his unwanted advice catches her off-guard. Klaus tries to use Hayley (recurring guest star PHOEBE TONKIN) to get the information he's after and makes an intriguing discovery in the process. Meanwhile, a bored Elena throws a wild party and gets into an ugly fight.
When Stefan returns to Mystic Falls with Elena and Jeremy, Caroline is worried about Elena's state of mind. Stefan reaches out to Dr. Fell for help.
On the island, Damon has an ugly run-in with a hunter. Stefan confesses his true feelings about the possibility of becoming human again to Elena.
Shane (recurring guest star DAVID ALPAY) leads an expedition to a desolate island off the coast of Nova Scotia, where he believes the secret of the cure lies hidden. On the trek to the island's interior, Rebekah (recurring guest star CLAIRE HOLT) and Elena continue their bitter rivalry, Stefan does his best to keep the peace and Damon accuses Shane of leading them into a trap. Bonnie and Jeremy try to figure out the message of the Hunter's mark, while Shane reveals more of the legend of Silas and the witch Qetsiyah, along with his own personal history. Back in Mystic Falls, Tyler confronts Klaus, and Caroline is caught up in the violence that follows.
After confronting her father, Mayor Hopkins, over his unconventional approach to ending the violence in Mystic Falls, Bonnie has a run-in with Kol.
Jeremy is furious when Klaus tries to control him by putting Matt's life in danger. Damon coaches Jeremy as he prepares to take on Klaus's new vamps.
Appearing unexpectedly at Mystic Falls High, Rebekah tries to force Stefan, Elena and Caroline to answer her questions about the search for a cure.
As a winter-themed party fills the streets of Mystic Falls, Stefan and Caroline are at odds with Tyler over his plans for Klaus and his hybrids.
Investigating a suspicion about Elena, Damon and Stefan visit New Orleans to see if they can find anyone who remembers their last visit in 1942.
Caroline does her best to be there for Stefan and Elena during a tough time. Damon tries to convince Stefan to help him uncover Prof. Shane's motives.
Terrifying hallucinations leave Elena shaken and confused. After giving Stefan disturbing news about Elena, Klaus takes matters into his own hands.
Download the TV Guide app for iPhone, iPad and Android!