Enola Holmes And The Clanging Coffin

When Enola Holmes hears a muffled clanging sound coming from a 'safety coffin' in a chilly cemetery, she follows the sound to a crudely dug fresh grave. She starts digging and inside a coffin she finds a girl who is drugged but not quite dead. But how to find where the girl belongs - or where she is running from - when she can't remember anything about who she is? Only Enola could persevere to solve the mystery, in the face of a gang of heavies on her trail and her brother Sherlock's strict warning to stay away from the case.