Synopsis

Firehouse 51 confronts a harrowing ordeal when a raging fire engulfs a fifteen-story apartment building, trapping residents on the upper levels. Adding to the urgency, the firefighters soon learn that one of those imperiled within the building may be someone they know. The story continues in Chicago Med, Season 4, Episode 2, "When to Let Go (II)," and in Chicago P.D., Season 6, Episode 2, "Endings (III)."