Since Elena is a major target, Alaric teaches her how to kill vampires. Katherine is busy trying to wake up Mikael since he might be the only person who can kill Klaus. He wakes up and is convinced he can kill Klaus. Katherine reminds him that he is still weak and that he needs flesh to function. He pulls Katherine into the coffin and bites her.
It's the first day of school for the kids in Mystic Falls. Bonnie and Jeremy are having issues since Jeremy keeps seeing Anna. Elena is having a hard time since it is her one year anniversary with Stefan. She convinces herself she needs to get over him.
Klaus' sister, Rebekah, comes to town and tells Damon she is crashing with him. She shows up at school and takes over Caroline's spot as queen bee. Matt continues to see the ghost of Vicky, and he brings her back to life. The catch is that she has to kill Elena to stay alive. Vicky doesn't stay alive for long.
Stefan decides to return to school to protect Elena. He is having a difficult time concentrating since he is high on human blood. The gang attends a back to school bonfire, and Damon goes to keep his eye on Rebekah. There, Elena stabs Stefan and Rebekah stabs Damon. Tyler feels that he is beholden to Klaus since Klaus essentially made him who he is today.