The episode centers on the secret investigation into , the son of Chief O'Neal, as actionable evidence of his involvement in a human trafficking ring finally comes to light. Key Highlights of the Episode

: The episode explores Hailey Upton’s obsessive drive to take down Sean, which threatens to put the entire unit at risk as she pushes boundaries to secure paperwork and leads.

In Season 10, Episode 7, titled " Into the Deep ," the Intelligence Unit finally confronts a case that has been haunting Hailey Upton.

: Upton and Voight reveal their suspicions to the rest of the team, leading to a high-stakes, off-the-books operation to build a case without alerting the Chief.

For more in-depth discussion and fan reactions, you can check out the episode threads on Reddit's Chicago P.D. community or read the full review on Telltale TV . Chicago P.D. Season 10 Episode 7 Review: Into the Deep