An elderly widower engaged to a murderer disappears on her wedding day; Trent reveals new findings surrounding the death of Sir's mother; Gabi baits Sir with a game of cat and mouse and navigates the fallout within her Mosely & Associates family.

Margaret reopens a teenage girl's missing-person case after an unidentified 4-year-old boy appears in the D.C. area; Lacey recalls a memory from her kidnapping that leads to a clue in the manhunt for Sir; Gabi makes plans to right her wrongs.