David is a widowed science fiction writer who adopts Dennis, a young boy who claims to be from the Red Planet. David believes the child acts strangely in order to process the difficulty he has had in his young life, but soon both David and his sister, Liz, begin to wonder if the boy might be telling the truth.

Walter Vale is a widower who teaches economics at a Connecticut university. He lives alone and is no longer motivated by his work. In New York to present a paper at a conference, he goes to the apartment that he has not visited in some time, but has kept since his wife was alive, only to discover a young couple living there. Despite their great cultural differences, Walter befriends Tarek, a Syrian citizen and drummer, and gradually builds a friendship...

Lawrence Wetherhold is a recently widowed literature professor who is a numb and chilly intellectual. He rebuffs his students, ignores his own teenage children, James and Vanessa, and spurns cries for financial assistance from his ne'er-do-well but rather soulful adopted brother, Chuck. After an accident and Lawrence goes to the hospital, he is deprived of the right to drive. Janet is a physician and former student of Lawrence who remembers her disappointment...