A suspicious man enters the station claiming to seek shelter from the storm, but his story quickly falls apart as the firefighters realize he is the person looking for the boy.

A massive storm plunges Chicago into chaos, causing a power outage at . During the storm, Captain Matthew Casey discovers a young boy named Logan hiding in the firehouse. The team eventually realizes the boy witnessed a double homicide and that the killer is actively hunting him to silence him. Key Plot Points

Traumatized by what he saw, Logan initially refuses to speak, leading the crew—specifically Sylvie Brett and Wallace Boden—to work together to earn his trust and protect him.

Tensions flare between Stella Kidd and Emily Foster over Foster’s perceived interference in Stella's relationship with Kelly Severide.