Based on the books by award-winning New Zealand author, Charlotte Grimshaw, The Bad Seed tells the story of Ford (Dean O'Gorman) and Simon (Matt Minto) Lampton, two brothers from a dysfunctional family with a dark history. Simon has escaped his past to become a successful obstetrician living in the best part of town with the perfect family. Older brother Ford, once estranged and still rough around the edges, appears to be the only outward disruption to Simon's controlled life. But when the Lamptons' neighbour is brutally murdered, Detective Marie Da Silva's (Madeleine Sami) routine investigation draws the household into a hurricane of scandal and threatens to change Simon and Ford's lives forever.