Leslie Calvin, the sole survivor of a submarine accident, goes to her relatives in order to recover emotionally. Unfortunately, she encounters various scam artists led by Mr. Sydney who intend to kill her and steal the family assets. Dr. George Grover helps Leslie to defeat Sydney.

Adam Hayward is a successful New York City defense lawyer. One day he receives a cable that the British war buddy who saved his life at Anzio Beach is now in trouble with the law in England. Taking the advice of his secretary to go to England rather than wire money, Adam arrives in his friend's village to find him about to stand trial for the murder of the hired stable-hand, Lawrence.

In early 19th-century Cornwall, young Mary Yellan travels to live with her aunt and uncle at the remote Jamaica Inn, where she discovers the inn is a front for a violent gang of wreckers who lure ships to their doom along the coast. As she becomes entangled in their crimes, Mary must fight to survive and uncover the truth behind the terror that haunts the moors.