Plagued by doubt

Year 1929, a rainy day in this month of October. Scotland Yard in disarray, the newspapers barely mention it. Numerous disappearances, but for the most part insignificant except for the noble Lord J.Flemming and his associates. Title of the weekly newspaper: "In the grip of truth". The question remains, but the solution is only to keep quiet about it. In parallel, the disappearances stopped at the same time. It was only a few months later that the tragedy resurfaced when Lucy Hemlock, the daughter of a missing person, tried to solve the dark case, but it seemed to lead her to a dead end. The only thing found in her father's belongings: a coaster with an address and a name. Hoping to find him, she decided to contact you, a brilliant detective organization. Getting closer and closer to the truth.. You wake up in an unknown room, chained and covered in masks. How did you get there? And what will be the sacrifices to get out?