Caroline (Candice Accola) is at the Salvatore house and tells Damon (Ian Somerhalder) and Stefan (Paul Wesley) that she met Katherine (Nina Dobrev) at the Grill.
Katherine wants to deliver a message to the Salvatore brothers; bring her the moonstone at tonight's Masquerade Ball otherwise she will rip the town apart.
Jenna (Sara Canning) gets back home after her "accident" with the knife and Elena and Jeremy (Steven R. McQueen) take care of her while Matt (Zach Roerig) helps them.
Bonnie (Kat Graham) arrives at the Salvatore house as well, where she finds Damon, Stefan, Jeremy, Caroline and Alaric (Matt Davis) getting ready for their plan against Katherine.
Stefan and Damon also arrive and look around to see if Katherine is there, while Jeremy and Bonnie find a room to prepare it with the spell.
Aimee (Tiya Sircar) interrupts them and Katherine kills her to show Stefan that she is not playing; he should give her the moonstone or people will start dying.
Stefan freaks out and wants to stop the whole thing but Damon convinces him that they have to finish it and they go to the room waiting and texting Jeremy that it is his turn.
Jeremy interrupts them asking to talk to his sister and when Lucy leaves, he tells Katherine to meet Damon and Stefan by the lake for the switch and he walks away while texting Caroline to be ready.
Caroline pretends that she does not know but under Katherine's threats, she tells her that they are planning to kill her, that Bonnie has the moonstone and that she is upstairs.
Katherine gets upstairs with Caroline and falls into the trap imprisoning herself into the room where Damon and Stefan are waiting for her.
Meanwhile, Jeremy and Bonnie fill Elena in who thinks they are crazy before she bursts into pain exactly the same moment Damon fires a stake at Katherine's back.
Bonnie realizes that the woman she saw earlier is a witch and tries to find her so she can break the link between Elena and Katherine.
She finds her and asks her undo the spell but Lucy tries to walk away making Bonnie grab her arm.
Katherine agrees and takes the moonstone but she struggles under a power while Lucy tells her that she should have told her that there was a Bennett witch involved.
Lucy tells Damon and Stefan that she has lifted the spell that binds Elena to Katherine, apologizes for her involvement and leaves.
She walks away and gets to her car at the parking lot, but before she gets in a mysterious figure with a mask on his face grabs her and takes her away.
[...] We’ve now opened so many doors with Tyler being a werewolf, Bonnie getting into her power, Lucy as a reoccurring character, and of course the doppelganger business.