Cosmo has lived with his grandparents since his brother died. The twelve-year-old adores his granddad and is dismayed when the old man shows signs of Alzheimer’s. Determined to help him recover his memory, Cosmo promises to visit Blackbrick Abbey when Granddad gives him a key. Opening the gates, Cosmo is drawn into an adventure that could help both Granddad and the rest of the family.

A gripping and sensitive story, the highlight of which is the tender relationship between Cosmo and his granddad.