Meredith, Richard and Alex must deal with the consequences after Bailey fires them for insurance fraud; after disappearing in the fog, Jackson helps a man in a dangerous situation; Tom gets new responsibilities at the hospital.
The doctors operate on a man who crashed into Maggie's car; Owen, back from paternity leave, struggles with Tom's new position; Meredith's recent firing doesn't stop her from diagnosing those around her; Richard and Alex start anew and it's not easy.
Meredith tiptoes the line of protocol as she helps Jo with a difficult procedure from afar; the sisters of a patient who is brain dead after a fall into a construction site must decide whether or not to keep her alive.
Meredith inadvertently stirs up negative press for the hospital; Jackson stands up to Koracick when he goes too far with a patient's family; Bailey receives unexpected news.
Meredith has a court hearing after skipping out on community service; Bailey and Jo have a patient that Jo realizes is from the treatment facility; Richard and Gemma grab breakfast together and things go awry.
Alex enlists Richard to help distract investors when he hears disturbing news about skeletons on the construction site grounds; Teddy tasks herself with creating original Halloween costumes for Allison and Leo.
Catherine is back in town and has no idea what's been going on between Jackson and Maggie; Owen and Amelia treat a woman who fell in the basement and quickly find that there is more to the story; Maggie is shocked after meeting Richard's relatives.
Meredith faces the medical board as her future as a doctor remains uncertain; Meredith is forced to reckon with her past in some challenging ways; the interns are put to the test.
Jo becomes a safe haven volunteer and gets a call that a baby has been dropped off at Station 19; Meredith moves forward with her life after facing the medical board; Jackson takes a big step in his budding romance with Vic.
Following the car crash at Joe's Bar and subsequent rescue efforts led by the Station 19 firefighters, Grey Sloan doctors work through the night to save the lives of their colleagues; Amelia worries about sharing her pregnancy revelation with Link.
Richard finds out Maggie quit Grey Sloan, and he is concerned about how she's handling the death of her patient; Bailey returns to work after taking some personal time; Meredith thinks she might miss DeLuca; Amelia updates Link on her pregnancy.
Jackson creates an uncomfortable situation when he invites his new girlfriend to what he thinks is Richard and Catherine's anniversary celebration; Levi brings Nico on a trip to visit an ailing family member.
DeLuca has a seemingly incurable patient and turns to a diagnostics genius for help; Bailey checks in on Joey, a foster kid that Ben brought into Grey Sloan; Amelia is getting the results of her paternity test.
DeLuca is irritated after Meredith takes over his patient whose symptoms continue to stump the doctors; Jackson, Owen and Jo work on a couple injured in a bear attack; Levi is hurt when Nico doesn't want him to meet his parents.
Meredith and Carina question DeLuca's uncharacteristic behavior when he volunteers to perform a life-threatening task during a blizzard; Bailey tries to help Joey with his future; Richard trains a new intern at the hospital.
Bailey and Ben face a huge, life-altering decision; Meredith and several of the doctors reflect on the past.
A wealthy inventor arrives at Grey Sloan and asks Koracick for help; Meredith struggles to save a woman with diabetes who has been rationing her insulin; Jo and Link fight to save a young man who fell onto train tracks.
Meredith heads up a pro bono surgery day, but the overwhelming patient response causes her to struggle to keep things in order; DeLuca treats a teenage patient whom he suspects is in danger.
Richard preps to present his PATH pen at the LA Surgical Innovation Conference but becomes distracted by his issues with Catherine; Maggie and Teddy run into people from their past; Hayes relives moments from when he met his late wife.
Owen and Link treat an older woman who wakes up from surgery and can't stop singing; Teddy helps Koracick stay afloat after an estranged loved one from his past comes to the hospital looking for help.