Jamie and Eddie find themselves at odds when Jamie learns that Eddie’s close friend Tracey may be using the restaurant she owns as a drug front. Also, Erin forms an alliance with Anthony and her ex-husband, Jack Boyle, when she is accused of causing the suicide of a former colleague. Meanwhile, Frank weighs whether he should fire a female officer who has an online profile featuring naked photos of herself, and Danny and Baez try not to be influenced by their own biases when they are faced with various descriptions of the same suspect.