The seventh season is set in a once-in-a-century pandemic that has caused a medical collapse around the world. The new situation is that Japan's top teaching hospital, Totei University Hospital, has made infection treatment and internal medicine a top priority and plans to postpone unnecessary emergency surgeries. The once famous surgery department has been moved to a branch building, and internal medicine doctors are promoting chemical surgery without using scalpels, showing signs of rising. Unknown, who was swept up by the infection crisis and the new power of Totei University, did not flinch and took her own path in the exhausted medical field like a battlefield.