If you find the secret radio frequencies (57, 66, 84) in the Curiosity Room, you can overhear The Circle's communications. They reveal that your predecessor escaped with samples and that they believe you (Hydrus) are already showing "signs of disunity". The Ending and Connections
The game’s narrative is pieced together through journals left by the missing couple. Their story is a tragic downward spiral driven by obsession and debt:
The Circle uses these "Collectors" to retrieve Null samples, which they believe are powered by the energy of "brilliant souls".
Realizing the Null was a malevolent force, Abigail tried to stop Edward. In the ensuing struggle, she hid the Null inside a complex dollhouse in the attic and fled.