In the Vietnam War epic, Martin Sheen stars as Army Captain Willard, a troubled man sent on a dangerous top-secret mission into Cambodia to assassinate a rogue Green Beret, Col. Kurtz (Brando), who has barricaded himself in a remote outpost. As Willard ventures deeper and deeper into the wilderness of the jungle, he embarks on a strange journey that leads him to Kurtz - but also forces him to come face to face with the terrifying vision of the heart of darkness in us all.