How can you know someone you've never met? Justin Hitchcock is divorced, lonely and restless. He arrives in Dublin to give a lecture on art and meets an attractive doctor, who persuades him to donate blood. It's the first thing to come straight from his heart in a long time. When Joyce Conway leaves the hospital after a terrible accident, with her life and her marriage in pieces, she moves back in with her elderly father. All the while, a strong sense of déjà vu is overwhelming her and she can't figure out why.