Baez gets injured while escorting confiscated drugs, so Danny goes after the drug cartel responsible. Elsewhere, a lieutenant with a commendable record engages in controversial behavior, putting Frank in a difficult situation.
Jamie stands up for an officer who is harassed for testifying against her partner. Erin learns her lover may be her boss at the DA's office. Danny asks Erin to file murder against a man who shot a 15 year old girl who died 8 years later.
Danny and Baez are temporarily assigned new partners when an officer is outed and his current partner won't ride with him. Meanwhile, Jamie and Eddie work on a revenge mission to steal a collar from a pompous detective, and Frank compromises his relationship with the Archdiocese when he speaks out about equality in the police force.