A crooked cop, a mob boss and the young girl they abuse are the denizens of a city's criminal underworld. It's a world that ordinary Arthur Poppington doesn't understand and doesn't belong in, but is committed to fighting when he changes into a vigilante super-hero of his own making, Defendor. With no power other than courage Defendor takes to the streets to protect the city's innocents. 不靠谱的Super Hero，很靠谱的Defendor。You are my hero boy！。是你让我不再逃走。一个真实的超级英雄。你总得相信什么，作为灵魂还存在的证据。平价英雄。傻大个，老男孩，真英雄。单纯的可爱，单纯的可敬。豆瓣的剧情简介就是放P....。用槍的是懦夫！。 亚瑟（伍迪·哈里森 Woody Harrelson 饰）是个无一技之长的建筑工人，大脑慢半拍，性格一根筋，但他沉迷于超级英雄漫画和个人英雄主义，幻想自己是个超人、蝙蝠侠一样的超级英雄，可以在夜间拥有另一个身份惩恶扬善。于是他用眼影、胶带自制了可笑的行头装备，武器更是毫无杀伤力的玻璃珠、橘子汁，每每在出手时被小混混揍得鼻青脸肿。一次挨揍后，一个年轻妓女凯瑟琳（凯特·戴琳斯 Kat Dennings 饰）帮助了他，相处中二人渐渐产生爱情，而亚瑟更要拿着凯瑟琳给他的枪，以卵击石地去找城市的大毒枭挑战……
