When a woman only known as M. begins writing anonymous confessions to a parish priest, she expects silence. Instead, Father Elian writes back. What starts as spiritual guidance soon twists into something far more intimate-a correspondence laced with guilt, yearning, and truths too dangerous to name. As their letters deepen, boundaries blur. Sin and sanctity bleed together. And the priest who should be saving her soul... may be losing his own. A century later, researcher Aemilia Sanz uncovers the lost letters in a sealed church archive-only to find herself tangled in a story of obsession, restraint, and ruin. In every letter, a line repeats. May your soul remain untouched. But some touches don't leave bruises. They leave echoes.
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