Declan Frobisher - one of four brothers, the son of the founder of the shipping company Frobisher and Sons - marries Lady Edwina, a petite social beauty, not suspecting that his chosen one at heart is as much an adventurer as he is. In the midst of his honeymoon, Captain Frobisher, who served under the chief of the British Secret Service, receives another assignment. He will travel to Freetown, the capital of Sierra Leone in British West Africa. There people, British subjects, disappear without a trace. The wife asks to take her with him, but Declan refuses - the task is fraught with danger. However, Lady Edwina is not one of those who meekly agrees to remain on the sidelines...