The 1983 murder of a graffiti artist who died after spray paint was forced down his throat is investigated. Meanwhile, new details emerge about the person who mugged Valen's mother; and Lilly faces additional legal hurdles thrown her way by Moe.

Lilly and the team attend a colleague's wedding and are persuaded by Jeffries to investigate whether the bride killed her former fiancé two years earlier---just hours after he called off their nuptials.