The sign on their door says “Welcome to Mrs. Cross’s home for Wayward Monsters” but siblings Midget, Squidget and Suzy are feeling anything but. Dropped off less than four hours and the the children have already been yelled at, pushed around and confined to their quarters. And that was just from the misanthropic doorman, Thorn. Together with their new friend Spike, the children must band together to explore their new home, and prepare for meeting the matriarch of the house, Grandmother Cross.

Confined to their room at Mrs. Cross’s home for Wayward Monsters, three siblings escape to explore the mansion’s dark corridors, only to find that a darker secret may already be searching for them.