In Shibuya, Tokyo, an illicit skateboard tournament called "13 Nights" occurs annually. Regrettably, the competition resulted in the demise of 14-year-old Masato, who was among the remaining eight pupils in attendance at Udagawa Middle School. His classmates were bewildered and at a loss for why he had to perish. However, when Eito arrives in Shibuya, he bears an uncanny likeness to Masato and pledges to uncover the truth about his fate.