An adventure serial in six episodes by Donald Wilson.
Starring William Franklyn, Lana Morris, Rona Anderson, Moray Watson, Ewan Roberts

When General Campbell left London for a secret visit to Scotland, he thought he had covered his tracks. But his secretary, Isobel Gilmour, guessed he had gone to see a scientist called Ferguson, in Argyllshire, and followed him. So did Roger Kenyon, a government scientist interested in Campbell's past connection with a rocket fuel project called Operation Jehu; and so did the Rev. Murdo Aitcheson, who persuaded Alison, the General's daughter, to accompany him to a small fishing inn, where Aitcheson had an unexpected encounter with a Mr. Caldwell.