Shibuya, Tokyo. An illegal skateboard race called "13 Nights" takes place once a year. Fourteen-year-old Masato dies during the race. He was one of the last eight students at Udagawa Middle School. His former classmates could not cope with his death or understand what lay behind it. Then, all of a sudden, Eito appears, who looks just like Masato and tries everything to discover the truth behind Masato's death.