The game begins with a woman trapped inside a human-sized glass tube. She breaks free by punching the glass, leaving her hand bleeding as blood spills across the floor. Strange barking sounds echo nearby while she searches for something to heal herself.

The room appears to be a laboratory, lined with many glass tubes similar to the one she escaped from. Inside them are figures that look disturbingly human — and some seem almost identical to her. As the strange sounds grow louder, she leaves the laboratory and finds herself inside a large, castle-like mansion.

As she explores, she discovers portraits of unfamiliar people and pieces of history displayed across the walls. Eventually, she learns that her name may be Ada. Mystery, danger, pursuit, and hidden secrets now surround her. What is her true role? What does the mansion hide? And will she ever escape?