The Oath tells the story of 2 medical practitioners and their vastly different approaches to treating patients.
The protagonists, a Chinese physician (Christopher Lee ) and a Western doctor (Jesseca Liu) , cannot be more different though their paths are destined to cross. Their keen competition begins when both get involved in a complex medical case. After working together, love slowly blossoms. However, Min Fei (Jesseca Liu) is diagnosed with cancer and Guo En (Christopher Lee) gets into an accident and loses his memory, completely forgetting who Min Fei is just when she needs him the most.
What would happen to this pair of doctors when misfortune befalls them?
Will their love be able to pull through all these trials and tribulations?