There are deep-rooted secrets in every family. Based on a series of books by award-winning New Zealand author, Charlotte Grimshaw, The Bad Seed tells the story of two brothers who have raised themselves from the desperate days of their early childhood, only to have their newly ordered lives begin to fall apart when one becomes a suspect in a murder and the police investigation draws the household into a hurricane of scandal. All five episodes of The Bad Seed will be available to binge on Thursday, April 29 via Sundance Now and the AMC+ streaming bundle.

Simon Lampton, played by Matt Minto, a respected obstetrician, has a lovely home in Herne Bay with two daughters and a beautiful wife, Karen (Jodie Hillock): a well-organized mother and pillar of their community. Older brother Ford, played by Dean O’Gorman, once estranged and still rough around the edges, is staying in the spare room and appears to be the only outward disruption to Simon’s controlled life. But Simon has a secret– he’s having an affair with a beautiful young woman from one of Auckland’s seediest suburbs. When Julia Stevens, the Lamptons’ neighbor, is murdered in her own home, Detective Marie Da Silva (Madeleine Sami) starts focusing on the Lampton household, and Simon’s attempt to cover up his affair begins to unravel his carefully constructed life.

To add pressure, Roza Hallwright (Chelsie Preston Crayford) the wife of the soon-to-be next Prime Minister (Xavier Horan), has decided to make the Lampton’s her best friends, ostensibly because Simon has contributed funds to her husband’s campaign, but she too has a secret that involves the Lampton’s. As Detective Da Silva digs further, Simon’s world starts to crumble. But it’s going to take more than spadework to uncover that this fall from grace is no accident, rather a careful unpicking by someone Simon thinks he can trust.