The Vanishing is Inspired by the Flannan Isle mystery. A small relief boat approaches the Isle, a tiny isolated island no bigger than a football pitch, 20 miles off a rugged coast. Its aim is to routinely replace the three lighthouse keepers, after 6 weeks alone manning the light. It nears the dock and none of the men greet them. The winch is broken. A call. Nothing. Experienced keepers Thomas, James and Donald have vanished. The lamps are clean and refilled; the table is laid for dinner. There is an upturned chair. Two sets of yellow oilskins are missing..The men were never found.
Summer 1939. Influential families in Nazi Germany have sent their daughters to a finishing school in an English seaside town to learn the language and be ambassadors for a future looking National Socialist. A teacher there sees what is coming and is trying to raise the alarm. But the authorities believe he is the problem.