Pack your bags for the ultimate sleepover! Dink, Josh, and Ruth Rose are heading to Moose Manor in Maine, an actual castle with soaring towers and thick stone walls. Exploring the huge rooms and winding hallways is an adventure on its own. The three friends are thrilled to spend the night in such an incredible place. Soon after they arrive, the excitement turns into a spooky puzzle. Strange noises start echoing from behind the thick castle walls. The kids quickly realize they might not be the only ones staying at Moose Manor. Could there be a hidden dungeon trapped somewhere deep inside the castle? Even worse, could the massive building actually be haunted by a ghost? The young detectives are too curious to just stay in their rooms and wait. They grab their flashlights and set out to investigate the creepy sounds echoing through the stone corridors. Follow along as Dink, Josh, and Ruth Rose search for secret doors and uncover the dark history of the Maine castle. You will need to be brave to help them solve this chilling mystery!