After several years away, FBI agent Henry Durand (Colin Hanks) returns to find his mother, Marty (Meg Ryan), a much different person: Having long mourned for Henry's father, she is now embracing single life. One day, while Marty, Henry and his new fiancée, Emily (Selma Blair), are out for a walk, they meet Tommy (Antonio Banderas), a mysterious stranger, with whom Marty then becomes involved. However, through his FBI contacts, Henry learns that Tommy is suspected of being an art thief.
