Nothing about Saitama passes the eyeball test when it comes to superheroes from his lifeless expression to his bald head to his unimpressive physique However this average-looking guy has a not-so-average problem-he just can't seem to find an opponent strong enough to take on! When aliens invade Earth a group of Class-S heroes finally finds a way to fight back & go on the offensive Inside the enemy mother ship Saitama fights Boros Faced with the alien's frightful power he decides to get serious! What is the Earth's fate?!