A new enemy is on the horizon. A candid conversation will soon take place between brothers. A former couple will take on a frightening risk.

And it will all go down on "Before Sunset," the penultimate Vampire Diaries episode of season three. It will air on May 3, one week after events from "Do Not Go Gentle." What, exactly, can fans expect leading up to the May 10 finale?

Read the official CW synopsis below.

Klaus acts on his intentions to leave town with Elena, but finds resistance from a surprising new enemy. Bonnie calls on Abby to help her with a difficult spell.

As events spiral out of control, Elena is determined to protect Caroline, Damon and Stefan enlist Tyler’s help, while Bonnie and Jeremy take a terrifying risk to make sure her spell is effective. Damon and Stefan have a surprisingly candid conversation about the future

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.