Lydia and her staff anxiously await the arrival of the Miracle Train, a mobile service that provides free surgeries, and Gabriel is shocked to see his old mentor, Dr. Aisha Ray, step off the train. Lydia tries to convince a patient to have a life-changing operation, while Sister Mari wants to help Jyoti, one of her best nurses.

AJ returns home from medical school to assist at the hospital on his break, while Greg discovers his daughter, Tommy, is hiding a shocking secret. When Lydia sends Ruby to investigate a possible case of dengue fever at a nearby mission village, Ruby decides to bring along one of her patients, who is searching for his long-lost love.