The Doctor is returning home to Gallifrey with the remains of his arch-nemesis, the Master. Forced off course, the TARDIS arrives in San Francisco on New Year's Eve 1999, where the Doctor is critically wounded in a gangland gun battle. At the local hospital, Dr. Grace Holloway fights, and fails, to save his life. Later, in the morgue, the Doctor wakes up a new man. But he is not the only one, the Master has also found himself a new body. As the clock...