In southeast London, a young mother has been accused of an unthinkable crime: poisoning her own child – and then leaving him to die.

The mother, Ellie, is secretive and challenging – she's had a troubled upbringing – but does that mean she's capable of murder?

Criminal defence lawyer Sarah Kellerman is tasked with proving Ellie's innocence. But Sarah's desperate pursuit of the truth will draw her – and her five-year-old son – into unimaginable danger...

Unsettling and compulsive, In the Blood is a chilling study of class, motherhood and power from a new star in crime fiction.