Part 1 of 2. The investigation of a multi-vehicle road accident unravels the shocking secrets of the complete strangers involved, revealing smuggling, murder, international intrigue, and betrayal. A remarkable cast led by Douglas Henshall (Primeval) and Kate Ashfield (Shaun of the Dead) portray the stories of the victims, survivors, and rescuers, who all share a single defining moment. (The original UK version)

Part 2 of 2. The investigation of a multi-vehicle road accident unravels the shocking secrets of the complete strangers involved, revealing smuggling, murder, international intrigue, and betrayal. A remarkable cast led by Douglas Henshall (Primeval) and Kate Ashfield (Shaun of the Dead) portray the stories of the victims, survivors, and rescuers, who all share a single defining moment. (The original UK version)

Karen, who vanished from the hospital, was found dead by suicide, and a black man's body was discovered in Danny's van. The Metropolitan Police avoided responsibility, and DI John was removed from the investigation. Suspecting something was amiss, he sought Anne's cooperation and offered to continue the investigation to uncover the truth.

While investigating Karen's death, new information emerges about James Taylor, prompting DI John and Ann to begin questioning him. Meanwhile, Danny remains missing. The police question Jeff and his wife, Sandra, who own Danny's van, but there is no evidence to detain them, so DI John releases them and decides to keep an eye on them.

[Final Episode] A man calling himself Ben Hickman appears before DI John, who is searching for evidence exposing Karen's stolen HDC fraud, and pleads for his help. Jane tells Dave her true feelings and heads to her meeting place with Richard, but Angela shows up there. And Ann realizes the cause of the multiple-vehicle accident.