Timmy and his friends live in a quiet town called Trinity, a place famous for a terrible circus explosion in 1937. When their teacher reveals that the circus once stood on the very spot where their school now sits, Timmy begins to wonder what else might be buried beneath the ground.
A hidden book in the school library leads him to a dark secret; the Blue House at the end of the street was the ringmaster's home. As Timmy and his friends explore the mysterious house, they discover a ghostly circus, eerie dolls, and a ringmaster who still wants to add to his family.
But when the ground begins to open and the town starts to disappear, the boys must uncover the truth and find a way to escape, before it's too late.