Many have heard the theory that an ex-lover is like an old book, no matter how many times you revisit it, the ending remains the same. It serves as a cautionary tale for those considering renewing a relationship with an ex. They should be prepared for the same heartbreak. She lives by this advice, never returning to old ones and always starting fresh with someone new. Yet, inexplicably, every new book she opens ends the same way, leaving her hurt and disappointed. Eventually, she begins to question if the real problem lies not with the books but with the protagonist, herself.