An inmate at Tonsgrove prison is murdered in her cell, but no one is willing to talk to the police. DI Gareth Williams is receiving pressure from above to solve the case - and quickly. Then, a local seventeen-year-old girl vanishes from her home. The close-knit community is shaken and they each have a different theory. Gareth knows that time is of the essence. With two major cases being investigated at the same time, the Beaumaris force is stretched thin. Frustrated at the lack of progress Gareth's colleague and fiancée, DI Laura Hart, decides to take action: going undercover at the prison

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