Willis continues to tend to Rox's medical needs in San Diego while Leanne and Max's father search for Ariel. Also, Noa and Mario realize their career choices will mean ending their relationship when Noa wants to accept a position in Philadelphia and Campbell offers Mario the attending position at Angels.
While rescuing an injured firefighter, Rox is hit by a drunk driver and rushed to Angels Memorial. Willis begins to realize his feelings for Rox and goes to great lengths to help her. Also, Leanne is excited to tell Ariel good news about her adoption.
Elliot fears the worst after hearing the emotional testimony by Detective Gomez's wife at his malpractice trial, but he hopes footage Diego shot for his documentary will change her mind. Also, Rox attempts to connect with Willis, but he pushes her away, and Leanne attempts to comfort Ariel in the wake of a devastating loss.
Rox accompanies Willis and Martin to the funeral of an Army buddy of Willis' brother, and Willis decides to get to the bottom of what happened to his brother's unit. Also, Max is brought to Angels Memorial with breathing difficulty, and Ariel tells him she loves him.
Mario joins Rox and Willis on the scene of a boat crash, and, in Center Stage, Leanne works to save a brother and sister who drank boiling water through a straw as part of a viral challenge. Also, Max's father tells Leanne to keep Ariel away from his son after he finds them kissing.
Rox decides to make amends with her former step coach when she arrives at Angels Memorial with the local high school step team after a pyramid stunt goes wrong. Also, Noa pleads with Leanne and Campbell to try any other method before performing an emergency hysterectomy on a young teenage girl experiencing complications after giving birth.
Willis and Rox arrive to the scene of a wildfire in the mountains of Los Angeles to tend to injured firefighters, and they volunteer to stay to look for a missing young boy who was separated from his father in the chaos. Also, Campbell confides in Angus about the difficulty with his job when his daughter becomes ill.
Over the radio, Leanne and Jesse talk a young girl through how to use the supplies on board a small plane to build a makeshift defibrillator when her mom, the pilot, loses consciousness mid-flight. Also, Rox and Willis are taken hostage at gunpoint while on their way to meet the plane at the landing site.
Elliot doubts his ability as a doctor when he's sued for his role in the death of a SWAT officer. Also, Willis and Rox arrive at a road rage accident resulting in multiple serious injuries, and Leanne discovers Ariel on an ice cream "date" with a young patient at the hospital.