Fishing Village Treasures

In the mud of the old London docks, a rusty badge revealed a secret that had been silent for many years. When Jon placed this badge of unknown origin on the table at 155B Ma Chain Street, Charlotte's eyes were as sharp as an eagle - this badge was actually related to a dangerous secret society that disappeared a few years ago. Who abandoned it on the dock? What is it that makes the long-disappeared community resurface? As the clues deepen, an old case hidden in the shadow of the foggy city is slowly showing its fangs.