The Secret Six have embarked on a thrilling sailing vacation in the picturesque Lake District. Joining them are their friends, the twins Summer and Scarlett, making this a holiday to remember.
The children investigate Shadowmere Rock Lighthouse, the home of the reclusive Captain Albert Finch. They find it empty, with a half-eaten meal left on the table, the solitary chair overturned, and old Albert nowhere to be found.
When a stranger with a...