Number 4 Newton Street is tall, thin, and smells of old biscuits.
It also has a secret.
When Oscar and Oliver move into their new house, Oscar notices something odd about the floorboard between the door and his bed. It creaks in a way that isn't quite right - too hollow, too deep, too present. And at night, when the house has settled and his brother is asleep, he hears something else entirely.
Skittering.
Beneath the floorboard, the twins find something that has been waiting in the dark for a very long time. Something that is about to change everything.
Some secrets want to stay hidden.
This one is ready to hatch.