Los Angles, present day
Emiko 'Emmi' Maeda set aside her studies following the sudden death of her father. Estranged from her mother and brother and burdened with guilt over her role in the tragic accident, she moves in with her godfather Jake and comes into possession of an antique mirror. While accompanying Jake to Japan on a film shoot, Emmi is caught in a freak storm and plunged through time-into the land of her ancestors.
The city of Kyoto is ablaze with violence and on the brink of civil war. Nakagawa Kaemon is a young samurai with a secret. He gathers information on those who claim to revere the emperor but harbor their own agenda to control the country. Kae is honor-bound to execute anyone who poses a threat to the throne-even if it is Emmi, the unusual young woman he has come to love.