A crime from 11 years ago is on Grace's thoughts due to a new case.

Grace is called to the crime scene where there is blood everywhere but no body; Ham and his wife separate; a ketchup and mustard incident becomes a running joke around the squad room.

A woman is brutally murdered and her son is abducted; the squad works frantically to find the missing boy; Bobby surprises the squad and his family by going under cover; Ham continues to struggle with his personal loss.

Grace and her crew investigate the unusual suicide of a court reporter, and conclude the crime was staged. Elsewhere, Grace tries forming a bond with Neely, despite the fragile physical state of the young drug abuser; and Rhetta is close to losing something very special to her.

The squad investigates the death of a 99-year-old man who has been shot in the head sitting in his home. The case, which resembles a crime that happened in Tulsa three years ago, offers Grace and Perry an opportunity to utilize their expertise in gambling-related crimes from the vice days.  It also gives Bobby a chance to reconnect with his dad and Ham a chance to connect with a kindred spirit. But Grace’s attention is drawn towards Rhetta when she learns something unexpected about Ronnie.

Summer finale. A prominent doctor fatally wounds an intruder in his house, but Grace feels the doctor's story isn't exact. Ham breaks some interesting news to Grace, and Earl tells her she will need to help Neely.