It’s summer and holidaymakers are flocking to the idyllic Brittany coast. But when first an old traveller woman dies in suspicious circumstances, and then a campaign of hate seemingly drives another victim to take his own life, events take a very dark turn. Mila Shepherd has come to France to look after her niece, Ani, following the accident in which both Ani’s parents were lost at sea. Mila has moved into their family holiday home, as well as taken her sister Sophie’s place in an agency which specialises in tracking down missing people, until new recruit Carter Jackson starts.

In 1903, fishermen find a wrecked boat containing a woman, who has been badly beaten, and a young girl. In 1993, All Hallows is now a boarding school. Following his mother’s death and his father’s hasty remarriage, Lewis Tyler is banished to Dartmoor, stripped of his fashionable clothes, shorn of his long hair and left feeling more alone than ever. There he meets Isak, another lost soul, and whilst refurbishment of the dormitories is taking place, the boys are marooned up in the attic, in an old wing of the school.

In the long, hot summer of 1995, 22-year-old Alice Lang rents a caravan on a holiday park on the outskirts of the lively holiday resort of Severn Sands. She befriends Marnie, a shy, damaged little girl whose father is the park's caretaker and whose mother died a few months earlier. Will, whose mother runs the bar, falls in love with Alice and is unbearably jealous of anyone else she sees. Tensions rise until one evening Alice disappears from her caravan. She's never seen again, and only her scarlet dress is found washed up on the shore.

1968, Sicily. Just months after an earthquake has destroyed the mountain town of Gibellina, Enzo and his wife Irene Borgata are making their way back to the family home, Villa Alba. When their car breaks down, Enzo leaves his young wife to go and get help, but when he returns there is no trace of Irene. 2003. TV showman and true crime aficionado Milo Conti is Italy’s darling, uncovering and solving historic crimes. When he turns his attention to the story of the missing Irene Borgata, accusing her husband of her murder, Enzo’s daughter asks her friend for help to prove her father’s innocence.

The sudden death of a pupil in Fleat House at St Stephen’s—a small private boarding school in deepest Norfolk—is a shocking event that the headmaster is very keen to call a tragic accident. But the local police cannot rule out foul play and the case prompts the return of high-flying Detective Inspector Jazmine ‘Jazz’ Hunter to the force. Jazz has her own private reasons for stepping away from her police career in London, and reluctantly agrees to front the investigation as a favour to her old boss.