Damon and Alaric come face to face with an old enemy after they obtain a weapon that may be able to destroy Cade. Stefan is held captive by a surprising acquaintance and is forced to confront a dark secret from his past. Meanwhile, Caroline and Matt try to keep Stefan's violent history from destroying him. Cade focuses his attention on Bonnie and digs deep into her mind.

A wedding is quickly planned in order for Damon and Stefan to lure a dangerous enemy out into the open. This looming threat puts the fate of Mystic Falls in imminent danger and must be destroyed.