Helping to start a mutiny of sorts, Frederick and a couple friends attacked Stefan in the woods. Our favorite blood sucker was out looking for animal blood and especially weak, so he couldn't put up much of a fight. Once they had Stefan in their clutches, Frederick and company took him back to the house and tortured him. Frederick wants vengeance against the Salvatores for the fact that Katherine's obsession with them led to their 145 years in the tomb.
Once Damon discovers Stefan has been kidnapped, he enlists Alaric to help because he hasn't been invited into the home where the vampires are residing. Alaric has some cool toys to assist with the mission, such as vervain-filled darts. Off he and Damon go to the house - and Elena, too, of course. They couldn't talk her out of it.
As Alaric and Damon do battle with these evil creatures, Elena abandons the car and finds Stefan locked in the basement. He's there with Harper, who tried to fight back against Frederick. Elena frees Stefan. She carries him back to the car... but he's REALLY weak. When Frederick attacks again, and drives a stake through Stefan, he hits the ground. Elena is able to stab Frederick right back, but Stefan is not doing well.
How does Elena save her man? By offering him her blood. Stefan drinks it down - and feels the scary effects! He springs to life, and totally goes off on Frederick, who was starting to recover from Elena's weak stabbing. Stefan is taken to an entirely new place by this taste of human blood, killing Frederick, but also scaring Elena.
When Pearl finally arrives home, she finds some dead vampires and a pissed off Damon. She says this isn't her plan.
Back at the Salvatore household, here's how the episode ends: with Damon walking in on his brother, who's developed a major eating disorder: he's just down bags of human blood and has a crazed look on his face.
In other storyline developments:
- Pearl has dinner with Mayor Lockwood. She tries to learn as much as she can about him and Mystic Falls.
- Forced off the main road by a storm, Caroline comes across Vicki's dead body. This discovery has a major impact on Matt, who takes the new hard; and on Jeremy, who basically admits to Anna that he wanted to be turned because he thought Vicki was a vampire and wanted to join her. That revelation upsets Anna.
Source: TV Fanatic