The novel is set in a rural English environment, where the main character, Leonora, is a reclusive writer. She reluctantly agrees to host a hen party in her glass house. The night is filled with intrigue and revelations, but Nora soon finds herself alone in the hospital. To solve the mystery, she must unravel the secrets and motives of others. She must also revisit parts of her past to figure out if she really is the only one who can help her save her family.