New York reporter Paige MacKenzie isn't convinced there's anything "sweet" about the small Gold Rush town of Sweet Sierra Gulch when she arrives in California to write an article for the Manhattan Post. But there's plenty of history surrounding the gold fever that drew prospectors from afar in the mid-1800s, as well as the anticipation of romance when her favorite cowboy, Jake Norris, joins her later.

Everything seems to be falling into place until the owner of the local cafe goes missing, a gruff guest checks into the hotel, and an odd humming sound prevents a peaceful night's sleep. Determined to get to the bottom of the mysterious events, Paige begins to follow clues. Will her search uncover a dangerous secret in the town's old mining tunnels, or will her curiosity land her in over her head?