Youngest son Jamie's life takes an abrupt turn when he's asked to become part of a clandestine investigation that could impact the family's legacy and reveal the truth about his elder brother, who died in the line of duty.
Danny, Erin and Frank work together to seek justice when the main suspect in a rape case is protected by diplomatic immunity.
When a diamond heist results in an off-duty police officer being killed, Frank and the entire are determined to catch this cop killer.
Erin's family have a strong discussion about her methods when she uses a law-abiding citizen as bait to take down his gang leader brother.
Three teenagers die from drug overdose, and Danny sets out to find their narcotic source and bring the responsible to justice.