Count Dracula, a 15th-century prince, is condemned to live off the blood of the living for eternity. Young lawyer Jonathan Harker is sent to Dracula's castle to finalise a land deal, but when the Count sees a photo of Harker's fiancée, Mina, the spitting image of his dead wife, he imprisons him and sets off for London to track her down.

In Vietnam in 1970, Captain Willard (Martin Sheen) takes a perilous and increasingly hallucinatory journey upriver to find and terminate Colonel Kurtz (Marlon Brando), a once-promising officer who has reportedly gone completely mad. In the company of a Navy patrol boat filled with street-smart kids, a surfing-obsessed Air Cavalry officer (Robert Duvall), and a crazed freelance photographer (Dennis Hopper), Willard travels further and further into the heart of darkness.