ONCE IN A LIFETIME Three low-income families have been given a handsome retainer to join Geraldine Borden for a day at her cliffside estate. All the parents must do to collect the rest of their money is allow their children to test out the revolutionary playground equipment Geraldine has been working on for decades. But there’s a reason the structures in the bowels of her gothic castle have taken so long to develop—they were never meant to see the light of day. When a band of dysfunctional children is suddenly thrust into a diabolical realm of violence, they must grow up instantly to have a chance at survival. Will they find a way to put their differences aside, or be swallowed up by the insidious architecture all around them?