Weeks of trials and tribulations come to a head when the rookies of 15 Division are left on their own and a frenzied night in the station culminates in a prisoner pulling a gun on Chris in cells. The ensuing inquiry has Internal Affairs looking for someone to blame. With careers on the line, the rookies reflect on the personal and professional choices that have led each of them to that night's events, walking a fine line between telling the truth and having each other's backs. Meanwhile, Gail is still trying to recover from her harrowing abduction, Chris is blindsided by a personal revelation, and Andy learns a secret about Nick's past.