The Riddle of the Sands

Carruthers embarks on what should be a relaxing holiday at the Baltic Sea but soon becomes entangled in a dangerous and intricate plot involving mysterious characters and secret schemes. Alongside his friend, Arthur Davies, he encounters figures like Herr Dollman and Commander von Brüning, whose intentions remain shrouded in secrecy. As they navigate the sands and uncover clues, they face the challenge of deciphering a conspiracy with potential war implications.