Archer's search for his father's identity leads him into hot water. Agent Barry Dylan is sent to rescue Archer.

The remains of a mythbuster television show host are found in the wilderness appearing to have been killed by the mythic Chupacabra, a reptile-mammal hybrid creature whose existence has not been confirmed. The team soon learns that the victim traveled to the remote West Virginian area to debunk the Chupacabra myth, and they interrogate possible suspects, including a rival wilderness-channel host/cryptozoologist/pet psychic. But when a tape is recovered at the crime scene and peculiar tooth marks are found in the victim's remains, the team learns details about the victim's demise that challenge the original theories surrounding his death. Meanwhile, recovering alcoholic squint Vincent Nigel-Murray makes amends with each member of the team and makes some surprising confessions.

The study group chooses their spring electives. Britta and Troy explore an acting class, and Abed picks a course that studies the 1980s sitcom Who's the Boss?. Meanwhile, Jeff and Pierce take a wine tasting class where they meet a mysterious woman who sweeps Pierce off his feet which raises Jeff's suspicions.

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April and Andy host a dinner party for the Parks Department. Meanwhile, Ann tries to move on from Chris at a singles' party.

Trevor Potter helps Stephen fill out super PAC forms, and Caroline Kennedy recites poetry.

Guest stars Kristen Bell and Jason Aldean. Geoff Peterson's 1 year anniversary. A sketch depicts Craig, Geoff, and T.J. the leprechaun partaking of "hallucinogenic frozen custard" with comedian Carrot Top and their subsequent gallivanting around Vegas. The sketch also featured appearances by Grant Imahara, Donny Osmond, Secretariat (the show's pantomime horse, voiced by Josh Thompson impersonating Morgan Freeman), Wavy and Sid (Craig's alligator and rabbit puppets), and culminated in Craig and Geoff marrying one another at a typical Vegas chapel.

The new manager, Deangelo Vickers, has everyone hoping to make good first impressions: Andy finds himself awkwardly typecast while Jim and Pam worry that they've come on too strong. Only Dwight is apathetic about the new leader.

As the high school prepares to throw a “1960s Decade Dance,” Elena starts receiving disturbing messages from Klaus via an unusual source. Bonnie tries to reassure Jeremy that she is strong enough to help Elena, but a worried Jeremy asks Stefan for advice. Caroline talks Matt into taking her to the dance. Expecting Klaus to show up at the dance, Damon and Alaric attend as chaperones, but Klaus is playing a complicated game that keeps them on edge. Finally, Damon comes up with a new plan of action that shocks and upsets everyone.