The traces left by the era of the samurai are still with us today. From this rich history of this ancient warrior culture comes a tale of honor, vengeance and redemption with a dark, sense of meaningless fatality. It is the origin story of a cursed vigilante, Ai, hell-bent on disposing those responsible for her clan's demise. Inspired by the great tradition of samurai cinema, Ai is an exploration of the era of the samurai and explores the themes of dormant fury for those who have lost loved ones and are driven to the point of madness with revenge.

The girl crosses the bridge and opens the door to adulthood. Saki, a lonely girl who lives with her father in New York, where she never wanted to come. On the other side of the Brooklyn Bridge, which she was not allowed to cross, she met people who were following their dreams, and fell in love for the first time.