A delusional vigilante is the latest unsub to test the BAU's profiling powers. Plus, Kate's niece Megan accepts a lift in a stranger's car.
The first responders race to help a homeless man crushed in a garbage truck. Elsewhere, a mother and son are in a crashed elevator and extreme hoarders are entombed in their house.
Elena tries to cope with the extreme highs and lows that are part of becoming a vampire. A stranger arrives in town and begins questioning Sheriff Forbes and Mayor Lockwood. Connor's actions quickly convince Stefan that they are dealing with a dangerous vampire hunter.
Connor continues his search to uncover the secrets of Mystic Falls and tries to convince Jeremy to work with him. With Dr. Fell's help, Damon and Klaus question Connor, but the confrontation takes a lethal turn.
It's Graduation Day and Mystic Falls is overrun with ghosts intent on settling old scores and fulfilling their supernatural destinies. As everyone gathers for the graduation ceremony and the ghosts converge, help comes from an unlikely hero.