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.