Sophie and Joseph's escape from Northwood is short-lived. The beast survived, and attached itself to Joseph's young cousin, Elise. Garrett writes to beg for their help. Joseph and Sophie travel to meet him at Kensington, a long-abandoned mansion that overlooks a dead town.
The house offers a small hope: its original owner had dedicated her life to researching the monster that possesses Elise. Garrett hopes to find a way to kill the creature without harming his daughter.
But Kensington is a dangerous building. Once the carriage leaves, they're trapped inside the collapsing walls and forced to confront the horrors within.