to catch and board his mother's train at the last second, and when he failed to do so and was left behind. Life with his mother Nemo moves with his mother to Montreal. When he is a rebellious teenager, a new girl, Anna, comes to his school, and he is immediately smitten. One day at the beach, Anna asks if Nemo would like to swim with her and her friends. He insults her friends and they hardly see each other again. In an alternate timeline, Nemo admits to Anna that he cannot swim, and the two spend time together. Nemo learns that Anna is the daughter of his mother's new boyfriend, and then husband, Harry, and the stepsiblings begin an affair, pledging their lives to one another. When Harry and Nemo's mother get divorced, Anna goes to New York with her father, and the teenagers lose touch. Years later, Nemo, who still hopes to someday see Anna again, works as a pool cleaner. One day, he and Anna pass at a train station and the pair immediately recognize each other. After a passionate reunion, Anna announces she is not ready to immediately resume the relationship. She gives Nemo her number and asks him to call her in two days and meet at a lighthouse in a local park, but he loses her phone number when a sudden downpour makes her note illegible. Nemo waits at the lighthouse every day, but Anna does not come. In one possible life, Anna and Nemo are married with children. Nemo works at a television studio narrating educational videos. One evening, while returning home, he hits a bird, loses control of his car, plummets into a lake, and drowns. Life with his father Nemo stays in England with his father, who later becomes disabled. As a teenager, he works in a shop and spends his free time writing a science fiction story about a journey to Mars. At a school dance, he meets Elise and falls in love. A few days later, he goes to her house and sees her with her 22-year-old boyfriend. Frustrated, Nemo speeds away on his motorcycle, has an accident, and is hospitalized in a vegetative state. Though he cannot move or speak, he can perceive the world through his senses and detects his parents' reunion at his bedside. He imagines his fingers are on the keyboard of his typewriter and