In the depths of the bleak New Zealand winter comes the rising of Matariki - a sacred constellation in Maori culture, heralding a time of new beginnings. For former Detective Senior Sergeant Hana Westerman, life is good: her work in her hometown of Tata Bay is going well, the community is thriving, and her daughter Addison is getting engaged.

But this Matariki brings unwelcome change. When Hana's ex-husband Jaye walks into an Auckland liquor store and directly across the path of a gunman, their family's hard-won peace is shattered.

With the stakes at their highest, Hana finds herself picking up a path she thought she'd never return to. Desperate for answers, she rejoins the police to help scour the city for the unidentified shooter. But as the investigation progresses, she finds herself unprepared for the darkness of the world she is entering.

A darkness much closer to home than she knows.