An urban spelunking group in San Francisco discovers a secret bunker belonging to the long-vanished 1930s stage magician Blackhall the Incredible at the same time as young, out-of-work magician Ivan receives a mysterious package that points him toward a possible conspiracy involving Blackhall's death in 1934. Both groups dive into the mystery, not yet realizing that it's about the change their lives forever.
Ivan and Backbone recover from the loss of a team member. Knowing now their very lives are at stake, the team must follow new clues even further into the forgotten places of the city. They are finally about to uncover their true enemies, but do they really want to know the truth?