A história de ‘The Tunnel’ é passada num labirinto de túneis e numa bolsa de água que existe no subsolo de Sydney, na Austrália. O filme convida-nos a seguir Natasha e a sua equipa de filmagens numa investigação para descobrir os verdadeiros motivos pelos quais o lago subterrâneo localizado debaixo da estação de Saint James passou de ponto turístico a zona interdita.

From St James's Palace in London, the historic proclamation of His Majesty the King takes place. For the first time since 1952, the Accession Council meets to make the formal declaration of the accession of the new sovereign. Following the Accession Council, the principal proclamation is read by Garter King of Arms.

While the government was in a deep sleep, the brain staff of the revolution was completing its final preparations at the Military Academy, there were only a few hours left for the revolution that had been prepared for six years. Despite six years of preparation, there was actually no serious plan at hand. An unplanned, unscheduled full night raid was to be organized. The management level of the army was pro-government. Therefore, it was impossible for the intervention to take place within the chain of command. This was to be a grassroots military operation. The army of the operation consisted of young cadets. Except for the Harbiye, there was no force at hand. It was even possible for units such as the Guards Regiment and the Central Command to resist. That's how the day of May 27 began with the unknown and risks. Major General Cemal Madanoğlu, the commander of the Revolution Headquarters, would have the last word...