Shibuya, Tokyo. An illegal skateboard race "13 Nights" is held once a year. 14-year old Masato dies during the race. He was one of the last eight students at Udagawa Middle School. There his former class mates can't cope with his death nor understand what lies behind it.

Then, all the sudden Eito appears, who looks just like Masato and tries everything to discover the truth behind Masato's death.