In the wake of the car accident, Watson and Laila lie injured and awaiting rescue as the team races to find them before it's too late. Meanwhile, in a state between life and passing, Watson's mind plays out a modern-day investigation of a case that has long haunted him.
A year after the passing of his friend and partner Sherlock Holmes at the hands of Moriarty, Dr. John Watson resumes his medical career as the head of a clinic dedicated to treating rare disorders. However, he soon finds that his old life is not done with him yet.