'Pleasantly plump' teenager Tracy Turnblad achieves her dream of becoming a regular on the Corny Collins Dance Show. Now a teen hero, she starts using her fame to speak out for the causes she believes in, most of all integration. In doing so, she earns the wrath of the show's former star, Amber Von Tussle, as well as Amber's manipulative, pro-segregation parents. The rivalry comes to a head as Amber and Tracy vie for the title of Miss Auto Show 1963.

Doc Jenkins may be one of country music's most beloved stars, but his private life is a wreck. He's split up with his longtime partner, Blackie Buck, a country outlaw with a heart of gold. Doc's singer-wife, Honey Carder, has thrown him out of the house. And now he's gotten involved with a sleazy music manager, Rodeo Rocky, who's out to steal his material. Teaming up with Blackie, Doc takes drastic measures to win back his family and reclaim his songs.

A sinister force permeating a secluded mountain estate convinces the nurse/companion of rock star Parker Stevenson, who has had a nervous collapse, that the house is alive and determined to keep her prisoner.