The 126 must respond again when the same woman who ran over her military husband crashed into a man dressed as a knight who has carbon monoxide poisoning. Treating the knight leads the 126 to a whole group of medieval restaurant clients exposed to the same. Mateo helps his old 129 captain who reaches out to him after the death of his lieutenant, but got too drunk to properly prepare the funeral speech, afterward offering Mateo a promotion if he returns. Recuperating at home after his heart surgery, Paul admits he feels afraid to come back to work, but Owen, Judd and Tommy help him regaining shape and reapply to the CFD.
