Lilly reopens a case from 1943 in which a female factory worker was found dead after an apparent accidental fall, but the investigation points to murder and reveals that the shy, married victim had secrets that may have lead to her death.

The body of an inmate who tried to escape in 1968 from a now-closed state penitentiary is discovered when a sinkhole opens up, and Lilly must determine if he was murdered. The evidence suggests that the man was the victim of foul play and Lilly learns that he had escaped from the prison twice before.