The Line Of Duty is a Most Wanted mission in Batman: Arkham Knight. Unlocked after apprehending Poison Ivy, it serves as a counterpart to another mission called Gotham on Fire.


Batman was assigned by Aaron Cash that all the firefighters of Station 17 have been missing in Gotham. As Batman rescues the fire crew, he finds out that Firefly made a deal with Chief Raymond Underhill to put all three fire stations on fire. As Batman rescued the chief, Batman sends him to GCPD Building for his actions.


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