约翰·库珀警官从背部手术恢复后返回工作岗位，并会见了他的新搭档杰西卡·唐警官，她是一名坚强、纪律严明的警察，在街上工作时带着自己的一套行李。莉迪亚的新搭档是鲁本·罗宾逊，她似乎逃不掉帮助一位不愿留在安全地带的前ci。本、萨米和杜威追着一名持枪男子进了一所小学，而本则撞上了一名紧张的街头警察，警察的玩世不恭态度影响了他们的工作。Officer John Cooper returns to duty after recovering from back surgery and meets his new partner, Officer Jessica Tang, a tough and disciplined cop with her own set of baggage from working the streets. Lydia, whose new partner is Ruben Robinson, can't seem to escape helping a former CI who won't stay in safety. Ben, Sammy and Dewey chase an armed man into an elementary school, while Ben bumps heads with an intense street cop whose cynical attitude is affecting their work.
