The plot is similar to the novel The Time-Traveler's Wife:
A man with a "Chrono-Displacement" genetic disorder unpredictably experiences time travel. The novel's conflict centers on his wife, the daughter of a wealthy family, coping with his frequent absences and dangerous experiences. The protagonist finds that his time travel is aggravated/triggered by stress. A central theme, unlike many other time travel stories, is that it is not possible to change the past or future.