April stays positive as tests are run on her baby; Dr. Herman plans a crash course in fetal surgery; Callie and Owen encourage each other to return to the dating scene; Bailey, Meredith and Maggie try to learn more about a patient's tumor.
Maggie gets upset when Meredith dodges her questions about DC; Bailey and Ben become concerned about Ben's brother after he is admitted to the hospital, and Dr. Herman starts to warm up to Arizona. Meanwhile, Richard feels manipulated by Catherine.
The hospital doctors become fascinated with Dr. Herman's case when Amelia gives a lecture detailing the intricacies of the surgery. Arizona and Herman continue to bond over the amount of cases they are trying to complete before the big surgery. Meanwhile, Bailey brings them a case of a pregnant woman who is close to her heart.
A group of children visit the hospital on a field trip and observe two injured cops rushed into the emergency room. Meanwhile, Stephanie develops a crush on one of the chaperones, and Amelia's forced to confront her feelings about Owen.
Upon realizing that Owen and Amelia have been seeing each other behind her back, Meredith comes down hard on her sister-in-law causing Amelia to rethink things. Meanwhile, Catherine springs into action when a man is brought into the hospital after his wife seeks revenge on his cheating ways.
The doctors from Grey Sloan Memorial Hospital spring into action to save the lives of two girls with a powerful story. Meanwhile, Meredith tries to cope with the fact that Amelia is now living with her and Jackson prepares for April's return back to Seattle.
The pressure is on as a determined Bailey tackles her first day as Chief; meanwhile, April's marriage is in jeopardy and she finds herself unable to address her problems; Meredith struggles to juggle all her responsibilities and Amelia works to define her relationship with Owen.
Maggie leaves her dinner party and races to the hospital, so April takes over the cooking duties in an attempt to avoid Jackson. Meanwhile, Arizona is extremely anxious about meeting Callie's new girlfriend, who happens to be a familiar face in Meredith's life.
A transfer resident arrives at the hospital. Meanwhile, Richard wants his relationship with Maggie to evolve; gossip follows a patient who mistakenly sent his sex tape to his congregation; and April presents a case involving a boy from the Middle East.
A high-stakes case is tackled by a team of doctors, and the atmosphere grows tense. Meanwhile, Bailey pressures Ben to evict their roommate; and Arizona enthusiastically reenters the dating scene with a new wingman.
As the rumor mill around the hospital continues to spiral out of control, Grey Sloan Memorial is flooded with injured firefighters from a nearby wildfire. Maggie struggles to keep things with Andrew professional at work; meanwhile, Jo questions Alex's priorities. Also, Alex decides to make a big step in his life.