For two centuries, an ancestral curse has troubled Seven Madison's family with misfortune and bad luck.

In London, sixteen-year-old Seven Madison has a painful past but leads an ordinary life... partying with friends, figuring out love and clashing with her mum over her career dreams, until she burns an old letter and everything changes.

A mysterious shopkeeper reveals the truth: Seven is a Zeffo, a supernatural gangster with the power to break her family's curse. Thrown into a war between gangs, magic, and betrayal, Seven uncovers secrets that shatter everything she thought she knew.

Now, she must make an impossible choice: save a friend, protect her family, or fight for her own future, as the curse threatens to trap her and her family forever. Seven must embrace her newfound powers and confront her destiny as a Zeffo. Only by believing in herself and her powers can she change the course of history.