The Lost Sonata synopsis:

After receiving a mysterious phone call, psychic medium Zack Gellar travels  to a large estate house in northern Peak Valley, where he is greeted by a desperate woman's pleas for help. Seeing that the woman is on the brink, he agrees to help her, vowing to communicate with the spirit that haunts her, and in turn help it to find eternal peace.

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Mysteries of Peak Valley centers around Zack Gellar, psychic medium. Zack  gained his ability to speak to the dead after an automobile accident that made him an orphan. After mastering in psychology during his formative years at university, he decided to make a living by communicating with the spirits that haunt his clients and, in turn, help the souls left forever to wander the mortal realm find their eternal peace.