The grandson of a war veteran is found dead from an overdose of heroin. He and his old army buddies swing into action and stake out the drug dealer, only to discover a web of police corruption surrounding the drug dealing. Given police complicity in the matter, they take the law into their own hands.
When Dr. Henry Jones Sr. suddenly goes missing while pursuing the Holy Grail, eminent archaeologist Indiana Jones must team up with Marcus Brody, Sallah, and Elsa Schneider to follow in his father's footsteps and stop the Nazis from recovering the power of eternal life.
In the opening chase, Martin Riggs and Roger Murtaugh stumble across a trunk full of Krugerrands. They follow the trail to a South African diplomat who's using his immunity to conceal a smuggling operation.