After being mysteriously transported to hell, Han Daesung has endured years of grueling battles against hellish creatures. When he finally defeats the ultimate boss, he earns a ticket to return to his home, planet Earth. However, upon his return, he discovers that Earth is overrun by monsters and demons emerging from mysterious gates. Once again, Daesung is forced to fight for his survival in this hellhole. Will his experiences in hell help him overcome another catastrophe?