Respected police officer John River, a gifted cop with a troubled mind, struggles to come to terms with the recent loss of a colleague, and chases a suspect across London - with tragic consequences. Now at odds with the authorities, River ends up in a precarious position as he seeks to bring closure to the mother of murdered teenager, who blames him for failing to keep his promise.
Under intense scrutiny, River must battle to keep his fragile mental state in check.
River begins to suspect that the man he chased to his death was innocent.
Unlocking her voicemails throws suspicion on somebody close to Stevie.
CCTV footage causes the investigation into Stevie's murder to change direction.
River and Ira uncover what Stevie was investigating before her murder.
The fractured events of Stevie's murder start to swim into focus for River.
Stellan Skarsgård
John River
Nicola Walker
Jackie 'Stevie' Stevenson
Adeel Akhtar
Ira King
Lesley Manville
Chrissie Read
Owen Teale
Marcus McDonald
Georgina Rich
Rosa Fallows
Eddie Marsan
Thomas Cream
Turlough Convery
Frankie Stevenson
Sorcha Cusack
Bridie Stevenson
Steve Nicolson
Jimmy Stevenson
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