In 1950s Canada, during a commercial flight, the pilots and some passengers suffer food poisoning, thus forcing an ex-WW2 fighter pilot to try to land the airliner in heavy fog.
A Scotsman abruptly breaks off his engagement to pretty Kitty and moves to his uncle's castle in the Scottish highlands. Kitty and her aunt follow Gerald a few weeks later, and discover he has suddenly aged. Some mysterious things happen in a maze made from the hedges adjoining the castle.
The latest assignment for respected detective Charlie Chan has come directly from the government and involves the disappearance of a scientist named Harper, who was working on an extremely important serum. When the scientist is killed, Chan must sort through all very likely suspects, including the man's sister and his butler.
