Seigi Akatsuka, a martial-arts prodigy, rescues a homeless man from thugs and receives a mysterious tattoo on his palm, a weapon called Void Maker that can warp space. US Army lieutenant Bluesy "Izzy" Fluesy arrives to recover the mark, pulling Seigi into an international arms race over these supernatural crests. With his childhood friend Toko Ichinose caught in the crossfire, Seigi must learn to control a weapon that multiple governments want back.