When a samurai shows up in Mystic Falls looking for a demon that possesses its victims, Josie leads the charge to defend her friends from the demon's wrath. Meanwhile, as Landon and Rafael head to Mystic Falls High in hopes of learning more about the mysterious Hope, MG is conflicted by a secret he's uncovered about Lizzie's new vampire friend Sebastian. Finally, just as Alaric lets his guard down around the town's new sheriff, a confrontation with a demon forces him to reevaluate his priorities.

As the Salvatore School prepares for its upcoming ‘80s-themed decade dance, Hope and Lizzie find themselves trapped inside a never-ending labyrinth with a monster on their trail. Meanwhile, Josie and Landon decide whether or not to take their relationship to the next level. Elsewhere, MG turns to Kaleb for advice on what to do about Sebastian, while Rafael struggles to adjust to his life back at the school.

When a truth-seeking monster arrives in Mystic Falls during Commonwealth Day, Hope and Lizzie fear that the secrets they've each been keeping have made them targets. Meanwhile, MG, Kaleb and Kym seek out an unlikely ally, who may have knowledge on how to take down the latest monster. Finally, Freya receives an unexpected visit from one of the Salvatore Students.