Scotland Yard detectives attempt to solve a spate of safe robberies across England beginning with clues found at the latest burglary in London. The film is notable for using a police procedural style made popular by Ealing in their 1950 film The Blue Lamp. It is known in the US as The Third Key.

Angela Barrows is a man-eating business woman sent by her American employer to investigate their export opportunities in Edinburgh. En route she meets Robert MacPherson, a businessman who asks for her help to bring his company into the 20th Century. The staff, led by Mr Martin, has other ideas—and a battle between the old and new business methods soon breaks out.

Stuck in a dead-end job, Graham Merrill adopts an otter, Mij, as a pet and then moves to an isolated village in western Scotland. Together they set out to explore the curious and magnificent natural wonders that surround their seaside home. Soon, Graham finds himself falling in love with the beautiful town doctor, Mary. Before long, the three become inseparable friends.

An escaped killer hides out by forcing a travelling family to take him with them.

In Scotland 1865, An old shepherd and his little Skye terrier go to Edinburgh. But when the shepherd dies of pneumonia, the dog remains faithful to his master, refuses to be adopted by anyone, and takes to sleeping on his master's grave in the Greyfriars kirkyard, despite a caretaker with a "no dogs" rule. And when Bobby is taken up for being unlicensed, it's up to the children of Edinburgh and the Lord Provost to decide what's to be done.

Army radiation experiments awaken a subterranean monster from a fissure that feeds on energy and proceeds to terrorise a remote Scottish village. An American research scientist at a nearby nuclear plant joins with a British investigator to discover why the victims were radioactively burned and why, shortly thereafter, a series of radiation-related incidents are occurring in an ever-growing straight line away from the fissure.

A World War II evacuee returns years later to England and finds his father in prison framed for murder.

At Balloch Moss mine in Scotland, water comes through a seam bringing a torrent of mud into the mine and flooding the pit shaft, resulting in 118 men being trapped, with nine missing. The only means by which the rescue team can bring the men out is through some old abandoned workings which are now full of gas and thus will cause delays in any rescue attempt.

Toff and Fingers head to a small Scottish village to lay low after stealing some antique silverware. The pair pose as a General and his batman looking their next job but the warm welcome, from the locals, makes them have second thoughts.

In London, a diplomat accidentally becomes involved in the death of a British agent who's after a spy ring that covets British military secrets.