During a call to a chemical leak at a factory, Capp (Randy Flagler) is severely injured by chlorine gas. Severide becomes obsessed with helping him and investigating the factory's safety violations. Subplots:

face relationship issues after Gallo follows bad advice and proposes marriage. Chicago Fire season 8 finale recap: 51's Original Bell

contemplates a career change and ultimately decides to return to medical school.

worries when a student from her "Girls on Fire" program stops attending.

This episode serves as the unexpected season finale due to production being cut short by the COVID-19 pandemic.