The 1968 death of an 18-year-old girl who apparently fell down a flight of stairs backstage at a debutante ball is investigated after her mother comes forward with new information. A local art dealer, who back in 1968 escorted the victim at the ball, is accused of killing his wife by pushing her down the steps. The mother believes it isn't a coincidence that both victims died in the same way. Lilly becomes convinced, too, but there isn't any evidence to prove it.

The 1998 murder of a young Colombian woman who was a drug mule is reinvestigated when the victim's handler is arrested after returning to Philadelphia for his brother's wedding. Lilly soon learns that Valens knew the victim because he worked undercover on a drug case in which the dead woman was involved.