In the small island of Alderney, a telephone operator becomes embroiled in a high-stakes drama that tests the limits of professional integrity and personal relationships. As the story unfolds, the operator finds themselves at the center of a thrilling and emotionally charged tale that takes place against the backdrop of history. With every ring of the phone, tensions rise and loyalties are tested, leading to a gripping climax that will leave you on the edge of your seat.

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Some movies that have similar genres and were produced around the same time as On The Line include Killers of the Flower Moon, Sound of Freedom, The Northman, Swallow, The Professor and the Madman, Hinterland.