The old lighthouse on the coast of Chelton has been in ruins for years. Now, all of a sudden, strange lights are flashing there. Who is doing it, and why? The Suzman and Levine kids, always ready for a new adventure, are eager to find out.

The trail they follow leads them on an exciting journey full of secret passageways, fantastic twists and old lost ships.

What will they discover at the mysterious lighthouse of Chelton?