Frank Grace attended the South Dakota School of Mines, learned to handle explosives and went to work for Grindcorps. Leasing a mine they knew to be played out, Grindcorps took out an enormous insurance policy, doctored Frank's charge so that it brought the mountain down on him, then collected his life insurance. Unfortunately for Grindcorps, Frank emerges weeks later, obtains plastic surgery in Costa Rica and returns to wreak his vengeance. The Detonator can explode anything from a skyscraper to a wine glass with no collateral damage.