In this thrilling teaser, Chicago's elite police force faces one of their most challenging cases yet. As "Black Ice" descends upon the city, tensions rise, and the officers must navigate not only the treacherous weather but also a high-stakes investigation that could have far-reaching implications. With lives hanging in the balance, the team is pushed to their limits, testing their resolve and unity. Expect intense action, gripping drama, and the relentless pursuit of justice in this electrifying new episode.