Mining engineer John Spargo is distraught when his mother is attacked in her home and later dies from her injuries. Her home has been ransacked. Determined to track down her killer and discover the truth behind her death, John finds a connection between his late father's wartime mine and the wreck of a U-Boat. The connection deepens when he discovers the diaries of the U-Boat captain and a wartime mission to spirit Goering to safety along with a fortune in stolen art. When John's daughter Jez is kidnapped, he is contacted by a mysterious consortium her life hangs in the balance unless he can find the stolen art. What is the link with his father's abandoned mine? Who was the U-Boat captain? Did he survive and hide Goering's treasures? John races against time to discover the truth...and in doing so may unearth secrets that were better left buried...