简介：OfficerJohnCooperreturnstodutyafterrecoveringfrombacksurgeryandmeetshisnewpartner,OfficerJessicaTang,atoughanddisciplinedcopwithherownsetofbaggagefromworkingthestreets.Lydia,whosenewpartnerisRubenRobinson,can'tseemtoescapehelpingaformerCIwhowon'tstayinsafety.Ben,SammyandDeweychaseanarmedmanintoanelementaryschool,whileBenbumpsheadswithanintensestreetcopwhosecynicalattitudeisaffectingtheirwork.