Meredith rethinks her plans; the interns are on thin ice following a patient's death; Simone and Lucas are immediately tested in an emergency; Richard confides in Bailey; Teddy's fate is revealed.
Bailey tells the interns they must complete dozens of basic procedures before being allowed back in surgery; things are awkward between Simone and Lucas; Amelia comes up with a solution to a complicated surgery.
Meredith and Amelia work to secure funds for their research while Amelia finds herself at odds with a new attending. Levi runs into someone from his past. Lucas ditches Mika, forcing her to treat a patient alone.
Dr. Arizona Robbins returns to Grey Sloan for a particularly complicated case; the interns are interrogated about their past mistakes; Teddy is eager to return to work after her health scare.
It's all hands on deck at Grey Sloan when a group of medical students is injured by a floor collapsing at their white coat party; Jo and Link are forced to talk about the future; Jules confronts Winston about his attitude.
Mika and Teddy receive a patient from a nearby penitentiary; Catherine pushes back on Link and Monica's treatment plan for a VIP; Bailey tries to integrate wellness into the residency program.
An unexpectedly complex case brings back painful memories for Simone; Jules and Blue make a high-stakes bet on who can finish their procedure log first; Richard suspects Winston is avoiding him.
Owen and Teddy have the day off but encounter an injured civilian; Monica enlists Amelia's help with an operation on a young patient; the interns complete their procedure logs, allowing them back into the operating room.
Just as Amelia comes to a realization, Teddy encourages her and Meredith to speed up their Alzheimer's research over fear of Catherine finding out; Mika finds herself caught in the middle of Link and Jo; Lucas receives bad news.
Wildfires threaten the Seattle region, leading to a flood of patients and emergency procedures; the doctors juggle overcapacity in the ER, complex surgeries and personal stress; Meredith makes a rash decision that can't be undone.
After firing some of Grey Sloan's best, Catherine continues to interfere with Meredith and Amelia's research; accidents at a climate change protest bring unique cases to the hospital; Bailey encounters a blast from the past.
Meredith and Catherine continue to disagree, and Meredith confides in Bailey for support; Richard, Winston and Lucas spend the day outside of the hospital; Blue deals with a relationship from his past; Levi meets the new hospital chaplain.
Simone and Lucas work to balance their relationship while competing to assist on an awake kidney transplant; Teddy offers Amelia a new opportunity; Ben's interview doesn't go as planned; Meredith's secret causes tension with Richard.
Mika struggles with a life-altering personal matter. Meanwhile, Bailey and Ben navigate their personal and professional roles, while Levi finds a connection in an unlikely place. Jo and Link get surprising news.
Teddy and Owen plan a date night that gets derailed in more ways than one; Jo struggles to do it all at home; Mika adds more to her plate to make up for taking time off to be with her sister; Levi is faced with a monumental decision.
In the midst of a deadly heat wave, the team at Grey Sloan struggles to keep up with an overwhelming amount of patients; Amelia and Winston face a challenging surgery; Jo and Lucas run an errand for the hospital.
