From the director of the Logie Award-winning Who Killed Dr Bogle and Mrs Chandler? comes a new forensic investigation into the disappearance of Prime Minister Harold Holt.

With Australia at war in Vietnam in 1967, suddenly Prime Minister Harold Holt disappeared without a trace - an event unparalleled in the history of western democracy. The nation was in shock and disbelief at the shattering news, hoping for a miracle for the man who famously declared it was "all the way with LBJ".

Police led a 'softly softly' investigation and concluded accidental drowning. But at the height of the Cold War paranoia, persistent doubts about his disappearance fuelled rumours and wild speculation.

Why did Holt go into such violent surf that day? Had he chosen a bizarre way out of a difficult situation? Why were police withholding crucial facts? What had they overlooked?

Holt himself left tantalising clues that challenged the official explanation. This is the story of the Prime Minister's secret world in the months before he disappeared - a world of betrayal, blackmail, political treachery, a poisonous feud, mounting physical and mental strain, and near-death experiences.

Reconstructed from eyewitness accounts, this dramatised documentary examines the political implications of the Prime Minister's disappearance and reveals explosive new aspects of the case.