In the sleepy town of Kazkodi, Ayla finds her closest friend in the moon, sharing her deepest secrets with its silent glow. Her predictable world is turned upside down when a letter, not meant for her, lands on her doorstep. Inside, she finds the soul-stirring words of Ryan, a man grieving a love he can never reclaim. Unable to resist, she seeks him out, and a tender, unspoken bond begins to form between two lonely souls. Through moonlit walks and shared silence, Ayla believes she is healing his broken heart. But she is unknowingly living a beautiful lie. When a devastating secret about Ryan's past comes to light, Ayla is forced to confront a heart-wrenching reality: she is the perfect reflection of the woman he lost. Is their connection real, or is she just a substitute for a ghost? "Not My Letter" is a poignant tale of love, loss, and the difficult choice between a comforting lie and a painful truth.