You Decided That I Was Worth Saving

Sybil realizes that both Damon and Enzo are tied to Bonnie and that she is main cause of whatever unwillingness to submit to her that either of them has left. Bonnie wants to put the search on Damon and Enzo on hold to help Caroline shop for a wedding dress but their day is ruined when Damon attacks. Caroline manages to save Bonnie but Sybil launches a new plan in which she forces Enzo and Damon to fight to death. Sybil introduces herself to Bonnie and Caroline and she tells Bonnie that she must choose between the two men. Bonnie, Caroline, and Stefan manage a head start to Damon and Enzo and try to keep the two from killing each other. However Damon eventually gains the upper hand just as Sybil arrives and Bonnie tells her that she chooses Enzo. However, Enzo being the more stubborn of the two, Sybil decides to instead force Enzo to shut off his humanity with Bonnie's life as a threat; when Enzo's humanity is off, Sybil sends Damon to kill Bonnie anyway and Alaric saves her last second and the ensuing supernatural violence is witnessed by Georgie. Bonnie takes Enzo back to their cabin to work on restoring his humanity. Stefan, Alaric, and Caroline, have Sybil captured now with Damon out to fulfill her mysterious plans.

Plot summary from Wikipedia (CC BY-SA 4.0). Source