With the fate of Mystic Falls at stake, Stefan and Damon must fight their greatest enemy for one last battle.
A wedding is quickly planned in order for Damon and Stefan to lure a dangerous enemy out into the open. This looming threat puts the fate of Mystic Falls in eminent danger and must be destroyed.
Damon and Stefan must join forces against Cade in order to save Elena’s casket. Meanwhile, Caroline and Alaric deal with their daughters’ burgeoning magical powers.
Damon and Alaric come face to face with an old enemy after they obtain a weapon that may be able to destroy Cade. Stefan is held captive by a surprising acquaintance and is forced to confront a dark secret from his past. Meanwhile, Caroline and Matt try to keep Stefan’s violent history from destroying him. Cade focuses his attention on Bonnie and digs deep into her mind.
In order to save Stefan’s soul, Damon makes a deal with Cade to retrieve the Maxwell journal. Alaric and Matt refuse to hand the journal over as it may contain the key to destroying Cade. Caroline desperately tries to connect with Stefan before Cade goes through with his plan.
Cade returns to Mystic Falls and presents Damon and Stefan with additional assignments, each with unthinkable consequences. Even with tension growing in their friendship, Caroline and Matt do their best to protect the town’s residents from Cade’s appetite for their souls. Bonnie and Enzo hit the road on a romantic trip, taking the bell with them in hopes to keep it safe.
Sybil enacts revenge on Damon by putting him in a catatonic state. Caroline and Bonnie enter Damon’s mind and run into familiar faces from the past, only to discover Stefan is the key to Damon’s fate. It’s a race against time for the bell as both Sybil and her sister Seline jockey for its control.
Stefan and Damon return to Mystic Falls at Sybil’s request as she is still in search of the historical artifact. Bonnie returns from Paris wearing a vile of Enzo’s blood making Caroline, wonder if she will become a vampire. Stefan, Damon, Caroline, Bonnie and Enzo all attend the Miss Mystic Falls pageant where Sybil continues to taunt Damon with memories of Elena.
Faced with the fallout from his interaction with Cade, Stefan is determined to have one thing go right – Christmas Eve with Caroline. However, when Damon and Sybil crash their Christmas Eve dinner, which had been joined by Alaric, Matt and Peter, things quickly take a dark and twisted turn. Meanwhile, in a series of flashbacks to Stefan’s past, Cade’s attempt to entice him with his mysterious agenda leaves Stefan faced with an unimaginable decision.
As Enzo continues to fight the control over him, Bonnie finds herself at the center of a deadly game and forced to make a heart wrenching decision involving two of the most important people in her life. At the Armory, Alaric researches a mysterious artifact that he hopes will help in their fight to get Damon and Enzo back. Finally, Damon’s downward spiral leads him to Tyler Lockwood who attempts to talk some sense into him before it’s too late.