The first of the month brings "Welfare Day" to 19 - Nick and Ben handle an array of belligerent civilians; the day caps off with a cataclysmic domestic disturbance.
A showdown between rival street gangs goes wrong leaving Ben's life in danger. Squad 19 gathers at Marie's for the Sergeant's party; Isabelle discovers Nick may have feelings for someone else.
Guilt ridden Officer Nick Barron returns to work following a deadly shooting; Ben Chartier's transfer to Station 19 turns rocky after a split-second decision triggers an internal investigation.