The Diver's Tunnel

When his father dies, Dave Owen, an ex-Royal Navy diver, inherits the family businesses and becomes a millionaire overnight. One of the businesses is Angling Charters, to which Dave adds commercial Diving. He is joined later by Joe, who was a Navy diver friend, and together they establish a diving company, but Dave has secrets he cannot share. His mother died very young, and his sister was murdered. All about them believe they know who the murder