The Bones Family lives in a dark closet, guarding the secrets and lies (little white ones and big whoppers) that belong to the hideous Biglums. But Little Billy Bones craves the excitement of the big wide world outside.

Then Millicent, a new friendly Biglum, arrives at the mansion. And when a skeleton-boy with a hidden history meets a no-nonsense orphan girl with a nose for mysery, the truth is bound to burst out of the Secrets Closet. . .