DCI Jess James and DI Sunny Khan uncover the secrets of a disparate group of suspects when a dismembered body found in marshland. Their team’s inquiries lead them to four suspects – a lecturer at a prestigious university, a journalist for a populist news channel, an interpreter who escaped Afghanistan and an autistic young carer increasingly drawn to online hate culture. As their investigation continues, the detectives also contend with personal crises – Sunny is adrift after breaking up with his long-term partner, while Jess tries to recover from her husband’s betrayal.