Cold Gold

The daughter of a former U-boat officer visits her father who lays dying in a Boston hospital. During the visit he hands her an old diary. He claims the diary contains a secret and is much sought after by others. He asks his daughter to promises she will act on the contents of the diary. Meanwhile, a wealthy German businessman knows of the diary and what it contains. He believes the diary is his and he will stop at nothing to recover it.
In England the son of recently deceased British trawler skipper is going through his father's papers. He come across  a story often told by his father about a time when he was trawling close to the coast off north Iceland. The trawler's nets snagged several wooden crates full of gold ingots. Soon afterwards the trawler was lost in a violent storm. It sank with the gold still onboard. With the help of two friends he decides to search for the wreck salvage the gold.
The problem is, they are not alone. An American couple and a German businessman are also searching for the gold...