The episode begins with Karen leaving in the morning after spending the night with Severide. She sees Shay at the breakfast table and bids her goodbye before leaving. “She is not 100 percent lesbian” Severide tells Shay with a smirk. Shay isn’t too happy that he and Karen have slept together. Later Boden and team arrive at a scene. It’s a factory that has caught fire. Boden mobilizes his team. At a distance Otis sees Ernie the kid who Boden had invited to the station during Thanksgiving dinner. Boden also sees him and is visibly unhappy. Inside the factory there are propane tanks, which the team ensures are removed before they catch fire. ..