Drs. Shaun Murphy, Asher Wolke and Aaron Glassman meet a patient with an infected surgical sponge that was left in their abdomen. Meanwhile, Dr. Morgan Reznick must face her own past when she treats the victim of a sexual assault. 

Shaun and Lea soon learn that their surprise pregnancy may also come with additional complications. Meanwhile, Doctors Park, Reznick and Allen treat a teen with Gardner's syndrome whose past surgical history jeopardizes the outcome of his current one.