The play is adapted from Josephine Hart's novel of the same name and focuses on a dangerous love triangle. The elusive Anna Barton and Martyn are already engaged, but she has a passionate secret affair with her fiance's politician father, William. Anna struggled to maintain the two relationships, while William on the other side was caught in a whirlpool that his wife, Ingrid, knew nothing about. But how long can the secret be kept before someone gets hurt?