Bernadette Crowley feels like she's finally getting a handle on her diabetes diagnosis. At least, she can finally manage to not summon a demon every time she checks her blood sugar. But without her Grandma Orla, who disappeared into the demon dimension while protecting their family's coven, even big wins don't seem to matter as much.
Frustrated that no one is trying hard enough to rescue Grandma Orla, Ber takes matters into her own hands, using her growing powers to try to reach the demon dimension. But nothing can prepare her for the truth, a history that ties together her family and demons back generations and a betrayal that has haunted them for years.
With her friends Cai and Phoebe and her alert dog Clio, Ber must venture into the unknown to save her grandma and the magical world as a whole.