After a baby girl is found dead, Briscoe and Curtis investigate the family and learn that her adopted family and brother were trying to keep some painful secrets. Jack gets a new partner, Abbie Carmichael, who had a 95% conviction rate in her four years with Special Narcotics. Together McCoy and Carmichael try to prove that the little girl's brother committed the crime.

The investigation into how a teen got wounded leads to a case involving a young woman's murder and a drug operation.