 It s a black day for the team as Cate is brought in after a drug overdose; Erica s brother AJ escapes during a prison van MVA and disturbed Paul Taylor, who has a grudge against Frank, brings a gun into the ED with disastrous results. Meanwhile, Zoe and Gabrielle treat Kyle Jackson who is admitted to the ED with bruising all over his body. They suspect his mother Louisa of abusing him but all is not what it seems.