Underwater archaeologist Kayla Richardson is called to the Golden Gate Bridge where repairs to one of the towers uncovers two human remains from the late 1800s and the 1930s. The head of the bridge restoration is Steven Michaels, who dives with Kayla, and a friendship develops between them. But as the investigation heats up and gold is found that dates back to the gold rush, more complications come into play that threaten them both. Could clues leading to a Gold Rush era mystery that was first discovered during the building of the bridge still ignite an obsession worth killing for?