Bull's romantic rival, Diana Lindsay, jeopardizes her career when she secretly has Bull come to Texas to assist a couple fighting against her former client for custody of their grandchildren.

Bull fears that his client's family ties will negatively impact the jury when TAC represents the seemingly innocent young heir, Connor McCandless, of an infamous crime family on trial for murder with his brother. As the trial begins, Bull aims to convince his client to sever his trial from his brother's, which would pit the siblings against each other in court.