A seemingly straightforward case of self-defense during a home invasion turns out to be more complicated than originally thought. Meanwhile, tensions flare when Cross asserts his authority and Angie pushes back.

Flynn and Vega investigate the drowning death of a socialite, and an unlikely party becomes a suspect in the case. Meanwhile, tensions between Flynn and Sgt. Cross escalate.

A case hits close to home for the Homicide team when the victim is one of their own, coroner Dr. Matthews. Detectives Angie Flynn and Oscar Vega lead the investigation with dogged determination, and Dr. Rogers honours the memory of her friend by taking his place in a high-profile trial, only to discover that Dr. Matthews may not be the person she thought he was. Meanwhile, Sergeant Cross blurs the line between professional and personal, which doesn't sit well with Angie.

Flynn and Vega must solve a case involving the death of a promising high school senior. Angie takes an aggressive approach to the case that Vega doesn't agree with. Meanwhile, Detective Lucas and Officer Sung's relationship starts to get personal.

When the Homicide team investigates a blood-soaked crime scene, the pressure is on to find a missing and badly injured bartender. Sergeant Cross joins Detective Flynn on the case, which gives her a twinge of guilt for leaving her trusted partner Vega out of the action.

Flynn and Vega are pulled away from Vega’s fathers wedding to investigate a skydiving jump gone wrong. While working the case, Angie makes an effort to regain Vega’s trust by sharing a sensitive file that contains information on Sgt. Cross.

Flynn and Vega go after an attacker who left a young man unconscious after a sexual encounter.

Flynn and Vega investigate a kitchen explosion at a popular diner that resulted in the owner's death. Meanwhile, Flynn decides whether she will testify for Sgt. Cross; and she tells Vega the truth about their past.

A man is trampled by his own horse, and the detectives suspect that the death was a homicide. Meanwhile, Vega discusses his concerns about the upcoming League of Nations Trial with Sgt. Cross; and Angie has a confrontation with prosecutor Samantha Turner.

An investigation into the death of a successful real-estate agent grows complicated when the primary suspect's family get involved. Meanwhile, Angie tells prosecutor Samantha Turner that she won't testify during Cross' trial.

A bestselling mystery author is murdered. Meanwhile, Det. Lucas' personal life suffers; and Angie receives a welcome surprise.

A case from Cross and Flynn's past reemerges and causes distress for both of them, making Flynn realize they have to be honest about their history.