Gary is a cantankerous, aging demon slayer who has nothing left to lose. Burdened by his “chosen one” status and backed by a team of specialists he can’t relate to, Gary struggles to keep interest in the Earth-saving duty he never asked for and doesn’t want.
It doesn't look good for humankind as the Demon Revolution continues and the end is nigh. Gary has a very sore back and looks to the rest of his team for help in defeating Ryndok.