Ex-cop Robert and his wife turn their remote Lake District guest house into a safe house. As a family under threat arrive, Robert tries to work out why they are a target.

The family at the Lake District safe house come under pressure as their cover story is tested. There is increasing concern for eldest son Sam.

While the police believe they are closing in on the man hunting David Blackwell and his family, Katy still has her doubts about Robert's methods and questions him further.

Sam and Joe head off across the lake and find themselves caught up in a terrifying ordeal. When events dramatically spiral, it has serious consequences for the family and Robert.

When former detective Tom Brook hears news of a shocking abduction, he is convinced that the Crow, a notorious killer, is back. The family of the missing woman are soon placed under Tom's protection in his safe house.

As the search for Julie intensifies, John's erratic behavior causes Tom to become suspicious.

Tom makes a huge breakthrough in the case which leads him to investigate a shady estate agent with links to the past abductions. Meanwhile, after Dani gets herself in trouble, the shocking reason why she mistrusts John is finally revealed.

Sam finally finds out the explosive truth about Tom's reasons for leaving the police. Simon and Liam arrive at the safe house, but danger follows them.