When the oddly-dressed but alluring Nicolas slips Katelyn a strange medallion, she is whisked back through time where her Watchmen hosts tell her she is the only hope to save Mont Saint Michel. Even worse, she learns that those trying to destroy the mount are led by a fallen angel intent on learning the mount's closely-guarded secret.
Katelyn is torn by feelings of anger at being taken back in time, inadequacy at finding a modern solution for a medieval problem, and responsibility for the mount’s starving inhabitants. She is also perturbed by her surprising attraction to the ill-tempered Nicolas. Will she stay to learn why she was chosen by the Archangel Michael and find a way to save his mount?