 Gabriel Knight, the Shadow Hunter, and his assistant Grace Nakimura receive an invitation from a Prince James of Albany. Upon arriving there, Prince James explains that there may be night stalkers, possibly vampires, creeping outside his infant son s nursery at night. Gabriel chases one of them when he finds the baby is snatched away without a trace. Grace joins him in Rennes-le-Chateau, France where their search for the kidnapped baby ties in with not only vampies, but also a treasure hunt involving religious secrets. They spend each hour solving the whole mystery, and once they finally figure it out, the truth long hidden for two thousand years will finally be revealed.