The show's main focus is about female cops all working in the same division of the San Francisco Police Department. They think that capturing the criminals are tough, but balancing their lives is the toughest part.
In the series finale, armed invaders threaten to blow up a school with 10 students and one teacher trapped inside. As the clock ticks, all the division try to figure out who these terrorists are and how to stop the villainous plan. All this happens on Jinny's and Hank's wedding day, no less.