Colleen and Lisa try to unravel an over one hundred-year-old ghostly mystery for a friend and in the process discover some relics from the Great 1906 Earthquake and fires that almost demolished San Francisco in the early morning hours of April 18th. Why was the Rainbow Saloon one of the only buildings in The City unaffected by the earthquake, when all of the other buildings surrounding it fell to the ground? What evil powers protected it? How did one spirit keep the disaster from occurring again and almost completely destroying The City, the world loves?
Along the way, Lisa solves a murder, Danelle and Ridge go through some tragedy and some joy, and Colleen learns that being a psychic detective can be more dangerous than she ever imagined.