A young man named Henry Shelburne disappears in the wilderness of the California mother lode. He leaves behind a gold-flecked ore specimen, a vial of liquid mercury, and a history of chaos.
A Silicon Valley venture capitalist named Robert Shelburne hires forensic geologists Cassie Oldfield and Walter Shaws to track his missing brother.
As they follow the rogue route blazed by the Shelburne family, the geologists begin to question which brother is on the hunt.
Hoping to save a life, they follow one of the ‘lost rivers’ of California into the dark history of the legendary lands, into the dark past of the Shelburne brothers.
