Menchi makes another break while Excel and Hyatt are out of town on a mission, and ends up on a boat to America. There, she meets Ann Anzai, a young lady who must travel the world in 80 hours before she can collect her inheritance from her grandfather, and accompanies the girl on her adventure. Can the two of them make it in time, and can Menchi defend her new friend from a mysterious assassin out to get both of them?