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.
A woman's abusive boyfriend targets Jamie after he intercedes in a domestic dispute. Elsewhere, the press get ahold of an illegal tape capturing Henry's insensitive comments, and Frank must deal with the ensuing scandal.
Frank is taken by surprise during an on-air interview with Erin's boss; Danny and his new boss clash as they investigate a drive-by shooting. Meanwhile, Jamie and Jenko help out detectives with an apparent suicide.