A team of assassins exacts a bloody retribution on Joe Logan – a former ninja who escaped his clan – and his family for betraying their ancient code. Rising from his seeming "death," Joe will re-emerge as his former self – Ninja Kamui – to avenge his family and friends and bring down the very clan that made him.

Into a world of magicians is born Mash, a young boy who lacks magic but is the strongest person around. His existence and destiny will change his world.