Rosie collects the children from their out-of-hours foster carer on New Year’s Day and instantly recognises Archie from a domestic violence workshop she helped with. Rosie remembers that when asked what he enjoyed most about the course, Archie said: ‘the biscuits’.

Social workers are concerned that Archie and Bobbi have been neglected. As Rosie gets to know the children, she begins to suspect that something far more disturbing lies in their past.

Archie, jovial and polite, bats away Rosie’s attempts to talk to him about anything serious with witty one-liners and sophisticated distractions. Bobbi reacts violently, lashing out and throwing herself around. Rosie has never seen a child as young a Bobbi behaving so viciously, but it is Archie she is most concerned about as the weeks go by.

After a worrying incident at school, Archie tearfully discloses the truth – a shocking secret that has left him and his sister traumatised. Horrified at what she learns, Rosie is dete