In 1961, United Nations‘ secretary-general Dag Hammarskjöld’s plane mysteriously crashed, killing Hammarskjöld and most of the crew. It’s understood that because Hammarskjöld was, at the time, advocating for Congo’s independence (against the wishes of European mining companies and other powerful entities), the “crash” was an assassination. With the case still unsolved 50-plus years later, Danish journalist, filmmaker, and provocateur Mads Brügger (The Red Chapel, The Ambassador) leads us down an investigative rabbit hole to unearth the truth. He, his Swedish private-investigator sidekick, and a host of co-conspirators tirelessly pursue a winding trail of clues, but they turn up more mysteries than revelations. Scores of false starts, dead ends, and elusive interviews later, they begin to sniff out something more monumental than anything they’d initially imagined.