Directed by William Cameron Menzies, The Maze was 3-D horror film that deals with teratology and prenatal phylogenetic evolution. It begins when Scotsman Gerald MacTeam (Richard Carlson) abruptly ends his engagement to Kitty Murray (Veronica Hurst) after receiving word of his uncle’s death.
Gerald inherits a mysterious castle in the Scottish highlands and moves there to live with the castle servants. Kitty refuses to accept the broken engagement and travels with her aunt Edith Murray (Katherine Emery) to the castle. When they arrive, they discover that Gerald has grown older and changed in a number of ways!
Whilst at the castle and the hedge maze outside of it, Kitty experiences a number of unexplained strange events (similar to legends associated with Scotland’s Glamis Castle) including their bedroom door being locked nightly from the outside. This prompts her to enlist the help of Dr. Bert Dilling (John Dodsworth) in an effort to discover what is wrong with Gerald.
In a bid to discover why they get locked in their rooms at night Kitty and Edith steal a key to their bedroom door and sneak out into the mysterious maze. There they discover Gerald and his servants tending to a frog-like monster. The monster panics upon seeing the strangers and runs back to the castle, hurling itself from a top-story balcony to its death!
At the end, Gerald explains that the amphibious creature was the actual master of the castle, Sir Roger MacTeam, and that he and his ancestors were merely its servants. The death of Sir Roger releases him from his obligation and he is able to return to a normal life and marry Kitty!