Burgess is put to the test as she looks to make an advancement in her career.

With the suspects still at large and conditions worsening underground, first responders race to reach the trapped victims, while the investigation into the assailants comes into focus.

The crossover starts on Chicago Fire S13E11 In the Trenches (I) and Chicago Med S10E11 In the Trenches (II).

A mounting street war threatens a community-center project that Atwater is trying to get off the ground.