To aid her rebel buddies, Nora enlists the help of Miles to infiltrate Monroe's base and assassinate him. Rachel continues work on a machine to amplify the mysterious pendants.
With the new shape-shifter on the loose, Scott and Stiles try to devise a plan to trap it. Meanwhile, Mrs. Argent sets out to deal with Scott once and for all.
Lydia starts to make associations about being attacked and bitten by Peter Hale, while Derek doubts his leadership skills as an Alpha. Jackson creates problems for Stiles and Scott.
Scott and Stiles uncover new evidence about the shape-shifter. In the mean time, Allison is given an assignment by her family.
At the Founder's Day Gala, Elena and Caroline compete in the "Miss Mystic Fall" contest. Elena is very happy to have Bonnie back but Bonnie still has some issues to work. Meanwhile, John Gilbert tries unsuccessfully to intimidate Damon, and Damon discovers that Stefan is hiding a very dangerous secret.moreless
Stefan and Damon find a common enemy and someone they deem to be a threat. Meanwhile, Elena confesses her love for Stefan and persuades him to stay in Mystic Falls, but she also makes a devastating discovery that adversely affects her relationship with him. Jeremy takes up drawing fantasy creatures again.moreless
Stefan tries to save Vicki from herself. Damon tries to take his necklace back from Bonnie, he is shocked by Bonnie's powers. Bonnie discovers more about her family's history. Matt takes Vicki to a haunted house.moreless
Elena seeks answers from Stefan about all the bad things happening in Mystic Falls. Stefan reveals how the rivalry with his brother began through a series of flashbacks. Damon controls Vicki's future. Meanwhile, Sheriff Forbes and Mayor Lockwood try to protect their town.moreless
Elena and Stefan go to the town's annual Founder's Party. Vicki wants Tyler to take her to the party. Damon tells Elena about the history of the Salvatores. Stefan tries to cut Damon out of his life.moreless