背景设定在不远的近未来，宇宙中有一位叫作丹迪的宇宙猎人，为了寻找各种未知的外星物种，与搭档旧型清扫机器人QT以及长得像猫的外星人喵一起在宇宙中到处冒险，并因此卷入一场场有趣的故事之中。

A group of allied intelligence agents discover that extraterrestrial beings arrived on Earth centuries ago and have been thriving through the exploitation of humans. Believed to be the origins of many of the creatures humans know from myth, folklore and legends, including vampires and werewolves, the group discovers that these aliens have now formed a sinister cadre bent on taking over the world for themselves. In response, the agents form a top-secret multinational agency known as The Global Alliance, charged with protecting the world from the alien threat and keeping it a secret from the public at any cost.