Marta, a young writer, once again receives a rejection from a publishing house. Disappointment paralyzes her thoughts, and she decides to write her greatest and final work — a farewell letter — to prove to everyone what she’s truly capable of. But there’s one problem: Marta can’t write. In search of inspiration, she goes to the city library to find a rare book about the last letters of great writers. There, she learns that the book has long been overdue — it’s still held by an unknown reader. Following the clues, Marta sets off to find this person, hoping the book will help her overcome her creative crisis.