After an EMT is shot and killed, Danny and Baez work to determine who is behind a chain of ambulance robberies; Frank defends New York's homeless community after the mayor puts a new law in place; Eddie offers to help Jamie pay off his student loans.

A widow blames Frank for her husband's recent suicide; Eddie has a gut feeling about a murder; a desperate Luis Delgado wants protection for his sons.

Frank must uncover the truth when an undercover officer accuses a fellow cop of police brutality. Also, Danny and Baez investigate the murder of a famous photographer recently accused of assault by his former models, and Erin struggles to protect a witness as new justice reform laws go into effect.

Danny and Baez work with Texas Ranger Waylon Gates when they are put on a case to find the Lone Star Killer. Also, after Eddie's partner, Officer James Addison, mistakenly shoots an undercover cop, internal affairs accuses Jamie of not supervising properly, and Frank speaks with Officer Addison about why he shouldn't turn in his shield.

Jamie is under investigation after his police vest is found on a perp. Frank debates whether to aid and protect an old friend whose home was invaded. Danny and Baez investigate the suspicious circumstances surrounding the death of a hotel employee believed to be a suicide. Erin asks Anthony to make a deal with a man who knows secrets about the current D.A.