Will and Kat travel to Mississippi to investigate the 1964 death of a Philadelphia woman who was secretly involved in helping bring supplies to the state's Freedom Schools, which educated black children. The victim's body was discovered in Pennsylvania. She was thought to have been involved in a hit-and-run accident, but new evidence, including a threatening letter, points to murder.

The 1951 murder of a marine who was reported AWOL on his last night of shore leave is reinvestigated. The new probe reveals that the victim was defending a fellow soldier on the night of his death.