From the critically acclaimed author of Hekla's Children comes a dark and haunting tale of an ancient cult wreaking bloody havoc on the modern world.

Struggling with the effects of early-onset Alzheimer's, Dennie Keeling leads a quiet life. Her husband is dead, her children are grown, and her best friend, Sarah, was convicted of murdering her abusive husband. All Dennie wants now is to be left to work her allotment in peace. But when three strangers take the allotment next to hers, Dennie starts to notice strange things.

Plants are flowering well before their time, shadowy figures prowl at night, and she hears strange noises coming from the newcomers' shed. Dennie soon realises that she is face to face with an ancient evil — but with her Alzheimer's steadily getting worse, who is going to believe her?