In a remote place stands a dilapidated, sinister manor. Young detective Alex receives a mysterious letter inviting him to solve a bizarre case. He arrives at dusk, where the elderly butler greets him anxiously.
The manor's owner vanished overnight without a trace, and strange noises were heard that night. While searching the house, Alex finds the owner's study in disarray and a diary hidden in a corner, filled with strange symbols and cryptic words.
As he investigates, it seems everyone in the manor has a secret. The butler is evasive, the maid is panic-stricken, and the gardener keeps silent. Later, Alex discovers a hidden chamber in the basement, its walls covered with mysterious maps and experimental equipment.
Just as Alex begins exploring the chamber, he hears footsteps behind him. He turns, but sees only a shadow vanishing in an instant. Alex knows he has become entangled in a dangerous mystery, and that the truth lies deep within the manor shrouded in mist.
