Late one spring evening, while The Bible Club is gathered around Chief's living room, a mysterious stranger arrives. In his hands, the man holds an invitation to a remarkable new adventure. This time, Abigail, Declan, Zayne, and their friends must journey overseas to help someone that they've never met find the answer to a baffling puzzle box, which has remained unopened for twenty years. But little do they know that opening the box is only the beginning of their most challenging, and dangerous, case yet!