Klaus acts on his intentions to leave town with Elena, but finds resistance from a surprising new enemy. Bonnie calls on Abby (recurring guest star PERSIA WHITE) 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; and Bonnie and Jeremy take a terrifying risk to make sure her spell is effective. Plus, Damon and Stefan have a surprisingly candid conversation about the future.