Leonora, known to some as Lee and others as Nora, is a reclusive crime writer, unwilling to leave her "nest" of an apartment unless it is absolutely necessary. When a friend she hasn't seen or spoken to in years unexpectedly invites her to a weekend away in an eerie glass house deep in the English countryside, she reluctantly agrees to make the trip. Forty-eight hours later, she wakes up in a hospital bed injured but alive, with the knowledge that someone is dead. Wondering not "what happened?" but "what have I done?", Nora tries to piece together the events of the past weekend. Working to uncover secrets, reveal motives, and find answers, Nora must revisit parts of herself that she would much rather leave buried where they belong: in the past.