Bobby Jones, son of a vicar, plays golf with Dr. Alwyn Thomas when he slices his ball over a cliff. The ball falls into the rocks below, where he finds the body of a dying man who had just gasped "Why didn't they ask Evans?" Bobby believes the man's death may have been murder and sets out to solve the mystery with socialite friend Frankie Derwent.
Along the rugged Welsh coastline, Bobby Jones finds a dying man at the bottom...