The black steel spanner was engulfed by its own "black flame" and was tragically turned into Malgam. In the past, he saw his parents murdered with his own eyes. Despair and hatred bring their parents back to life and have them killed again and again in front of their eyes. Anger towards his master who hid his past and locked away his power for 10 years. Helpless, Houtarou and his friends help Kyoka create a screwdriver and think about their only hope of saving Spanner. Spanner vows to take revenge on Glion even if he becomes Malgam. What appeared in front of him was his former senior wearing a dread mask. Who will control their power and win the battle? And what is the outcome of the spanner that is eaten away by black flames...