Susannah, a young widow and single mother, has remarried well: to Max, a charismatic artist and popular speaker whose career took her and her fifteen-year-old son out of New York City and to a quiet Vermont university town. Strong-willed and attractive, Susannah expects that her life is perfectly in place again. Then one quiet morning she finds a note on her door: I know who you are. Max dismisses the note as a prank. But days after a neighborhood couple comes to dinner, the husband mysteriously dies in a tragic accident while on a run with Max. Soon thereafter, a second note appears on their door: Did you get away with it? Both Susannah and Max are keeping secrets from the world and from each other -- secrets that could destroy their family and everything they have built.