back cover text Sarah Peters has barely recovered from her harrowing cruise. She'd much rather hide away and just do desk work at the police station. But when the psychologist at the nearby women's prison is found dead, something she thought was lost resurfaces: her investigative instincts. The case is peculiar, because all the inmates were locked up at the time of the murder—or were they? Reluctantly and with her usual stubbornness, Sarah Peters follows her instinct and agrees to investigate inside the prison, unaware that she's made herself a target. Because nothing and no one remains unobserved behind those walls.