Vertical Descent

When a U-boat is sunk off the coast of Corsica in 1943, it takes with it a mysterious cargo which was being secretly transported under SS guard.

Mike Summers, a technical diving expert, has his life thrown into chaos when he accidentally discovers wreckage from the U-boat and crosses swords with a notorious Corsican nationalist leader, resulting in the death of his friend.

The race to discover the motive for the killing take...