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. Originally written in the form of short stories, Mysteries of Peak Valley: Case 1: The Lost Sonata is the first in a series of 'interactive ghost story' adventure games.
It’s been a year since the Boulyn incident and a prestigious case lures Zack back to Peak Valley. Arriving at Burnom Manor, famous for being allegedly haunted by a woman dressed all in white, Zack must use his psychic medium talents to finally unravel the legend of the White Lady.