Ernesto, a writer always trying to find inspiration for his masterpiece, finds an old brass safe that contains a photo of a young couple, Mercedes and Andrés, along with a series of love letters. He begins to investigate the couple's story using the information he finds in their letters. The intriguing image, taken on the day the Civil War broke out, and the possible fate of the two protagonists, will help him to write his great novel as he becomes a witness to the wounds of love, life and death. The three wounds' is a novel of reconciliation, of feelings, of loves and absences that shows us the only things worth living and dying for.