Derek and Meredith adjust to life at home with their newborn; Arizona tries to repair her marriage; Jackson and Owen clash over financial issues.
Callie makes a decision about her relationship; the doctors receive devastating news.
Following the storm, a mudslide injures first responders and citizens; Meredith faces a decision that will impact a loved one; Callie is rocked by Arizona's infidelity.
The medical drama, moving into its tenth season, follows the personal and professional lives of a group of doctors at Grey Sloan Memorial Hospital in Seattle as they deal with the lives of their patients and their relationships with each other.
As the storm rages, patients are brought to the hospital by the busload and resources dwindle; a doctor's life hangs in the balance.
The doctors prepare for a superstorm headed for Seattle; as Owen becomes closer to Ethan, his desire to be a parent gets stronger; Meredith and her baby are put in danger.
Bailey continues to shut everyone out; Owen worries that Ethan could end up in foster care; a new craniofacial specialist comes to the hospital to work on a young patient; a magician's assistant needs medical attention after a trick goes awry.
After several of Bailey's patients die, she becomes the focus of a CDC investigation; Cristina teases Alex about his feelings for Jo; Owen continues to take care of Ethan while his parents remain in the hospital.
Unsettling news motivates Derek and Meredith to take preventive steps for their children's future; Syrian doctors come to the hospital for a crash course in basic surgical skills; April decides to tell Matthew the truth.
A gas tanker explodes on a highway, resulting in multiple injuries; Jo and Meredith try to help a frantic woman, whose child has a mysterious illness; Alex is forced to work with Jo's boyfriend.
More positive changes are made by the hospital's new management; Meredith worries about her unborn baby; Alex decides to give Jo's boyfriend a run for his money.
Discord and chaos created by new management causes one doctor to question his future at Seattle Grace; the doctors and interns juggle multiple transplant surgeries simultaneously.
As news of Seattle Grace's financial issues spreads, Catherine wants Jackson to move to Boston and the interns fear for their jobs; the doctors try to save the hospital by meeting with a possible investor; Jo is impressed with Alex.
Owen is faced with tough decisions as Seattle Grace spirals toward financial ruin; Jo and Alex try to save an infant's life; April turns to Jackson for dating advice.
Several of the doctors compete to be the new face of Seattle Grace; April brings an emergency case to the hospital; Alex and Jackson work with a transgender teen couple; new policies test the patience of the staff.
Derek and April fight to find a solution for the hospital; Cristina works to respect the wishes of a dying boy's family; Arizona identifies with a teenager who is facing similar problems.
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