Far in the future, human life has been augmented with clones, machines and ""robotoids"". At CENTRAL INC., MrrHiman is plotting a dramatic experiment: to make the legend of King Arthur real, by allowing a superhuman robot to escape into the past. When the robotoid ART0R1US arrives in Anglo-Saxon England as an adolescent boy, he quickly makes an impression with his incredible fighting powers and absence of fear. As Artoris, or Artor as he becomes known, grows into a man, he begins to alter the past and threatens to upset the time-space continuum. MrrHiman realises his mistake and sends scientist MrrLin to retrieve him, accompanied by LanCilotech and a fighting machine, Murdred, unknowingly designed to kill Artor. Will Artor continue to threaten the future by altering it, or will Murdred fulfil his own destiny by killing Artor and turning him into a legend?